From patchwork Sat Sep 23 00:29:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725827 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6CB24CE7A8A for ; Sat, 23 Sep 2023 00:29:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230448AbjIWA3n (ORCPT ); Fri, 22 Sep 2023 20:29:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230440AbjIWA3m (ORCPT ); Fri, 22 Sep 2023 20:29:42 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93B651A7; Fri, 22 Sep 2023 17:29:36 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 046C3C433C9; Sat, 23 Sep 2023 00:29:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428976; bh=ldAq2tGryuf5HSb3UenWHmNL2txk3o4RbpCKtjqNOcU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e5sF0g0cNIvP3B/BrOmbm52OnZEgJqG5rIhWn8OsLW5/nuHVxQLsSbofq6kYWFW/W TAqrAbcghOQfD0JO4ASSIJAZnqQLgtGJW+EgBnvlApQua9KSZyIs4KRxiPI4/xqIBG ll04UIYY3HRgH8om5CPSCfgnW2Itk+v5FRZk45RldXOS4pnDWzpsArsHzR0+kCla9V +8CdU6dw1taquc3UYYvy9/5L5n9DwlWjF6N/5TJuJvMKKSzgxhiP3aDmD5t9Nq72YF TXi/pTwOcOOkH5itdtHPwCNNcCoHmZn3nYofcOBiVqSAlLzli/CqPzBLc/LH5ElN4w yIfGjt1MMPKOw== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 01/23] ata: libata-core: Fix ata_port_request_pm() locking Date: Sat, 23 Sep 2023 09:29:10 +0900 Message-ID: <20230923002932.1082348-2-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The function ata_port_request_pm() checks the port flag ATA_PFLAG_PM_PENDING and calls ata_port_wait_eh() if this flag is set to ensure that power management operations for a port are not scheduled simultaneously. However, this flag check is done without holding the port lock. Fix this by taking the port lock on entry to the function and checking the flag under this lock. The lock is released and re-taken if ata_port_wait_eh() needs to be called. The two WARN_ON() macros checking that the ATA_PFLAG_PM_PENDING flag was cleared are removed as the first call is racy and the second one done without holding the port lock. Fixes: 5ef41082912b ("ata: add ata port system PM callbacks") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Reviewed-by: Niklas Cassel Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen Reviewed-by: Bart Van Assche --- drivers/ata/libata-core.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 0072e0f9ad39..732f3d0b4fd9 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5037,17 +5037,19 @@ static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, struct ata_link *link; unsigned long flags; - /* Previous resume operation might still be in - * progress. Wait for PM_PENDING to clear. + spin_lock_irqsave(ap->lock, flags); + + /* + * A previous PM operation might still be in progress. Wait for + * ATA_PFLAG_PM_PENDING to clear. */ if (ap->pflags & ATA_PFLAG_PM_PENDING) { + spin_unlock_irqrestore(ap->lock, flags); ata_port_wait_eh(ap); - WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); + spin_lock_irqsave(ap->lock, flags); } - /* request PM ops to EH */ - spin_lock_irqsave(ap->lock, flags); - + /* Request PM operation to EH */ ap->pm_mesg = mesg; ap->pflags |= ATA_PFLAG_PM_PENDING; ata_for_each_link(link, ap, HOST_FIRST) { @@ -5059,10 +5061,8 @@ static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, spin_unlock_irqrestore(ap->lock, flags); - if (!async) { + if (!async) ata_port_wait_eh(ap); - WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); - } } /* From patchwork Sat Sep 23 00:29:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725826 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A923CE7A89 for ; Sat, 23 Sep 2023 00:29:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230466AbjIWA3x (ORCPT ); Fri, 22 Sep 2023 20:29:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49274 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230440AbjIWA3p (ORCPT ); Fri, 22 Sep 2023 20:29:45 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2DEC1A8; Fri, 22 Sep 2023 17:29:39 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1243EC433C7; Sat, 23 Sep 2023 00:29:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428979; bh=6/gHyN2ekZWWjPRG6Y55Waf1Y/Wfg30IYpSFTS1WmfE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Cv0ltgDIPb9IJfbITwAu2L+WOOMZ9R3bUsZk21gUFrcjpshYztcw36I8Phk//brd3 T59Tm1EwIgigbgz3CM6hSIXzXxHlq0HEiTDPIEOBJ0Ybfr/5/U/NanJPfo192Ov2LM FNO0W9wxWA+jnXk0B6piex0f9cMw275ao1SUKlYFx9lN4tKZRem3ZVsVnC5qZ1yZy8 QyxE2XpW2iAuMrDPXqEt7ckONIpnImDZ7I5C1QBNhL3iQY+/hX5jgVd5PXlZJ8EyIS dD2onQCPBGQOxb2wAvJ9XxNc+fJ/h+zek3kI1yhGydpH7Om15jZ6UDLwCDspAgrrEi pCEOm8gKFt7/w== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 03/23] ata: libata-scsi: link ata port and scsi device Date: Sat, 23 Sep 2023 09:29:12 +0900 Message-ID: <20230923002932.1082348-4-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org There is no direct device ancestry defined between an ata_device and its scsi device which prevents the power management code from correctly ordering suspend and resume operations. Create such ancestry with the ata device as the parent to ensure that the scsi device (child) is suspended before the ata device and that resume handles the ata device before the scsi device. The parent-child (supplier-consumer) relationship is established between the ata_port (parent) and the scsi device (child) with the function device_add_link(). The parent used is not the ata_device as the PM operations are defined per port and the status of all devices connected through that port is controlled from the port operations. The device link is established with the new function ata_scsi_slave_alloc(), and this function is used to define the ->slave_alloc callback of the scsi host template of all ata drivers. Fixes: a19a93e4c6a9 ("scsi: core: pm: Rely on the device driver core for async power management") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Niklas Cassel Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen Reviewed-by: John Garry --- drivers/ata/libata-scsi.c | 45 ++++++++++++++++++++++++++++++++++----- include/linux/libata.h | 2 ++ 2 files changed, 42 insertions(+), 5 deletions(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index fb73c145b49a..8b43290ca2cd 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1089,6 +1089,42 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) return 0; } +/** + * ata_scsi_slave_alloc - Early setup of SCSI device + * @sdev: SCSI device to examine + * + * This is called from scsi_alloc_sdev() when the scsi device + * associated with an ATA device is scanned on a port. + * + * LOCKING: + * Defined by SCSI layer. We don't really care. + */ + +int ata_scsi_slave_alloc(struct scsi_device *sdev) +{ + struct ata_port *ap = ata_shost_to_port(sdev->host); + struct device_link *link; + + ata_scsi_sdev_config(sdev); + + /* + * Create a link from the ata_port device to the scsi device to ensure + * that PM does suspend/resume in the correct order: the scsi device is + * consumer (child) and the ata port the supplier (parent). + */ + link = device_link_add(&sdev->sdev_gendev, &ap->tdev, + DL_FLAG_STATELESS | + DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); + if (!link) { + ata_port_err(ap, "Failed to create link to scsi device %s\n", + dev_name(&sdev->sdev_gendev)); + return -ENODEV; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ata_scsi_slave_alloc); + /** * ata_scsi_slave_config - Set SCSI device attributes * @sdev: SCSI device to examine @@ -1105,14 +1141,11 @@ int ata_scsi_slave_config(struct scsi_device *sdev) { struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); - int rc = 0; - - ata_scsi_sdev_config(sdev); if (dev) - rc = ata_scsi_dev_config(sdev, dev); + return ata_scsi_dev_config(sdev, dev); - return rc; + return 0; } EXPORT_SYMBOL_GPL(ata_scsi_slave_config); @@ -1136,6 +1169,8 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev) unsigned long flags; struct ata_device *dev; + device_link_remove(&sdev->sdev_gendev, &ap->tdev); + spin_lock_irqsave(ap->lock, flags); dev = __ata_scsi_find_dev(ap, sdev); if (dev && dev->sdev) { diff --git a/include/linux/libata.h b/include/linux/libata.h index bf4913f4d7ac..4ece1b7a2a5b 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1148,6 +1148,7 @@ extern int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]); extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); +extern int ata_scsi_slave_alloc(struct scsi_device *sdev); extern int ata_scsi_slave_config(struct scsi_device *sdev); extern void ata_scsi_slave_destroy(struct scsi_device *sdev); extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, @@ -1396,6 +1397,7 @@ extern const struct attribute_group *ata_common_sdev_groups[]; .this_id = ATA_SHT_THIS_ID, \ .emulated = ATA_SHT_EMULATED, \ .proc_name = drv_name, \ + .slave_alloc = ata_scsi_slave_alloc, \ .slave_destroy = ata_scsi_slave_destroy, \ .bios_param = ata_std_bios_param, \ .unlock_native_capacity = ata_scsi_unlock_native_capacity,\ From patchwork Sat Sep 23 00:29:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725825 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47276CE7A92 for ; Sat, 23 Sep 2023 00:29:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230481AbjIWA35 (ORCPT ); Fri, 22 Sep 2023 20:29:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230457AbjIWA3u (ORCPT ); Fri, 22 Sep 2023 20:29:50 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3AC0B1B0; Fri, 22 Sep 2023 17:29:44 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1EFCC433C9; Sat, 23 Sep 2023 00:29:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428983; bh=k/n1E/0sX1Kh1J/5A7PeVx3HzBPcsCroCRQBlVX2+y4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n2vLeUm9pAZl24FNr5syL9oQp/oVX1CWMGfGPVFcTTnusRkWYUbvIFUfD+a5/GVIh dB/f0RiilsjImr03os0zDxwGjO/7/IOn2qlnW1VPuf5eRPqsRDPOisvN4cHSCTuMmK 9DMt3MLCqbxFTwp2qF1812TBmJnD9bfOuQj0dhYxGbEiTkbfjES4N9JZQbJmJclxoX GjviXu2eZ7QhPYet6Z2oxoCrTmVooAUVmvYc997dlb+9q+Cl8JOD6g6JSfip8n3yLB l97i8eaaX29iUy8Bf3oky/amnrugSoH+o7XXFZLFTtMUg0Zz9dxOCryotJLTug2lRM uakbYrhWmwH4g== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 06/23] scsi: Do not attempt to rescan suspended devices Date: Sat, 23 Sep 2023 09:29:15 +0900 Message-ID: <20230923002932.1082348-7-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org scsi_rescan_device() takes a scsi device lock before executing a device handler and device driver rescan methods. Waiting for the completion of any command issued to the device by these methods will thus be done with the device lock held. As a result, there is a risk of deadlocking within the power management code if scsi_rescan_device() is called to handle a device resume with the associated scsi device not yet resumed. Avoid such situation by checking that the target scsi device is in the running state, that is, fully capable of executing commands, before proceeding with the rescan and bailout returning -EWOULDBLOCK otherwise. With this error return, the caller can retry rescaning the device after a delay. The state check is done with the device lock held and is thus safe against incoming suspend power management operations. Fixes: 6aa0365a3c85 ("ata: libata-scsi: Avoid deadlock on rescan after device resume") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Niklas Cassel Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen Reviewed-by: Bart Van Assche --- drivers/scsi/scsi_scan.c | 18 +++++++++++++++++- include/scsi/scsi_host.h | 2 +- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 52014b2d39e1..3db4d31a03a1 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -1619,12 +1619,24 @@ int scsi_add_device(struct Scsi_Host *host, uint channel, } EXPORT_SYMBOL(scsi_add_device); -void scsi_rescan_device(struct scsi_device *sdev) +int scsi_rescan_device(struct scsi_device *sdev) { struct device *dev = &sdev->sdev_gendev; + int ret = 0; device_lock(dev); + /* + * Bail out if the device is not running. Otherwise, the rescan may + * block waiting for commands to be executed, with us holding the + * device lock. This can result in a potential deadlock in the power + * management core code when system resume is on-going. + */ + if (sdev->sdev_state != SDEV_RUNNING) { + ret = -EWOULDBLOCK; + goto unlock; + } + scsi_attach_vpd(sdev); scsi_cdl_check(sdev); @@ -1638,7 +1650,11 @@ void scsi_rescan_device(struct scsi_device *sdev) drv->rescan(dev); module_put(dev->driver->owner); } + +unlock: device_unlock(dev); + + return ret; } EXPORT_SYMBOL(scsi_rescan_device); diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 49f768d0ff37..4c2dc8150c6d 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -764,7 +764,7 @@ scsi_template_proc_dir(const struct scsi_host_template *sht); #define scsi_template_proc_dir(sht) NULL #endif extern void scsi_scan_host(struct Scsi_Host *); -extern void scsi_rescan_device(struct scsi_device *); +extern int scsi_rescan_device(struct scsi_device *sdev); extern void scsi_remove_host(struct Scsi_Host *); extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *); extern int scsi_host_busy(struct Scsi_Host *shost); From patchwork Sat Sep 23 00:29:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725824 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC003CE7A8A for ; Sat, 23 Sep 2023 00:29:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230487AbjIWA36 (ORCPT ); Fri, 22 Sep 2023 20:29:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230458AbjIWA3v (ORCPT ); Fri, 22 Sep 2023 20:29:51 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE0751B1; Fri, 22 Sep 2023 17:29:45 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E4F1C433CA; Sat, 23 Sep 2023 00:29:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428985; bh=5ISZ2rm1XsWohf5fIrMtKwvajdQR6fdIx2ZEQbWXz6s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TCTYZParBpkeCDtW0DCkJWMVw3pKeZweTMiI4VrEaXGdh9RSD8H22Ce+Zl1sIjwkZ WXhy/EIPd75Tok63NnlwjudEcCMC8t9eeT0inYBmVBhqA5l487f4orBCFjSMPD6Qdy VfxbF8CD14PwgyBUPkRGiVgmsUjE2iJ7SbD2AO6PvgU9Wzx9i9F5y1TNrsjElL/BoX evIt4eDPP+fGZzMKP9ypZSKjsMxtfZryJwSBj67JS4uWB1a+A9RL/73Cwse3YDGeml RMqFfxJGb+ik1pnlGOH/sWD+GHvFDhcYjXdm1TtcLNu+ExeakagbL6UjJRx2A7zHmS RmCMQ3Bkl2jVw== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 07/23] ata: libata-scsi: Fix delayed scsi_rescan_device() execution Date: Sat, 23 Sep 2023 09:29:16 +0900 Message-ID: <20230923002932.1082348-8-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Commit 6aa0365a3c85 ("ata: libata-scsi: Avoid deadlock on rescan after device resume") modified ata_scsi_dev_rescan() to check the scsi device "is_suspended" power field to ensure that the scsi device associated with an ATA device is fully resumed when scsi_rescan_device() is executed. However, this fix is problematic as: 1) It relies on a PM internal field that should not be used without PM device locking protection. 2) The check for is_suspended and the call to scsi_rescan_device() are not atomic and a suspend PM event may be triggered between them, casuing scsi_rescan_device() to be called on a suspended device and in that function blocking while holding the scsi device lock. This would deadlock a following resume operation. These problems can trigger PM deadlocks on resume, especially with resume operations triggered quickly after or during suspend operations. E.g., a simple bash script like: for (( i=0; i<10; i++ )); do echo "+2 > /sys/class/rtc/rtc0/wakealarm echo mem > /sys/power/state done that triggers a resume 2 seconds after starting suspending a system can quickly lead to a PM deadlock preventing the system from correctly resuming. Fix this by replacing the check on is_suspended with a check on the return value given by scsi_rescan_device() as that function will fail if called against a suspended device. Also make sure rescan tasks already scheduled are first cancelled before suspending an ata port. Fixes: 6aa0365a3c85 ("ata: libata-scsi: Avoid deadlock on rescan after device resume") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Niklas Cassel Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 16 ++++++++++++++++ drivers/ata/libata-scsi.c | 33 +++++++++++++++------------------ 2 files changed, 31 insertions(+), 18 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index a0bc01606b30..092372334e92 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5168,11 +5168,27 @@ static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) { + /* + * We are about to suspend the port, so we do not care about + * scsi_rescan_device() calls scheduled by previous resume operations. + * The next resume will schedule the rescan again. So cancel any rescan + * that is not done yet. + */ + cancel_delayed_work_sync(&ap->scsi_rescan_task); + ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false); } static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg) { + /* + * We are about to suspend the port, so we do not care about + * scsi_rescan_device() calls scheduled by previous resume operations. + * The next resume will schedule the rescan again. So cancel any rescan + * that is not done yet. + */ + cancel_delayed_work_sync(&ap->scsi_rescan_task); + ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true); } diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index a69d63e7b919..576bb51cb480 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -4756,7 +4756,7 @@ void ata_scsi_dev_rescan(struct work_struct *work) struct ata_link *link; struct ata_device *dev; unsigned long flags; - bool delay_rescan = false; + int ret = 0; mutex_lock(&ap->scsi_scan_mutex); spin_lock_irqsave(ap->lock, flags); @@ -4765,37 +4765,34 @@ void ata_scsi_dev_rescan(struct work_struct *work) ata_for_each_dev(dev, link, ENABLED) { struct scsi_device *sdev = dev->sdev; + /* + * If the port was suspended before this was scheduled, + * bail out. + */ + if (ap->pflags & ATA_PFLAG_SUSPENDED) + goto unlock; + if (!sdev) continue; if (scsi_device_get(sdev)) continue; - /* - * If the rescan work was scheduled because of a resume - * event, the port is already fully resumed, but the - * SCSI device may not yet be fully resumed. In such - * case, executing scsi_rescan_device() may cause a - * deadlock with the PM code on device_lock(). Prevent - * this by giving up and retrying rescan after a short - * delay. - */ - delay_rescan = sdev->sdev_gendev.power.is_suspended; - if (delay_rescan) { - scsi_device_put(sdev); - break; - } - spin_unlock_irqrestore(ap->lock, flags); - scsi_rescan_device(sdev); + ret = scsi_rescan_device(sdev); scsi_device_put(sdev); spin_lock_irqsave(ap->lock, flags); + + if (ret) + goto unlock; } } +unlock: spin_unlock_irqrestore(ap->lock, flags); mutex_unlock(&ap->scsi_scan_mutex); - if (delay_rescan) + /* Reschedule with a delay if scsi_rescan_device() returned an error */ + if (ret) schedule_delayed_work(&ap->scsi_rescan_task, msecs_to_jiffies(5)); } From patchwork Sat Sep 23 00:29:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725823 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37A53CE7A88 for ; Sat, 23 Sep 2023 00:29:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230495AbjIWAaB (ORCPT ); Fri, 22 Sep 2023 20:30:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230470AbjIWA3y (ORCPT ); Fri, 22 Sep 2023 20:29:54 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD4321AC; Fri, 22 Sep 2023 17:29:48 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B37FC433C9; Sat, 23 Sep 2023 00:29:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428988; bh=MuctF/o58jy6c7woF6om1M9AQSPCX03Gki7M9JuoGGY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rIQsjzKr4uSvuP4wV7hWiVrhLlpYofA4KPsSz4eEn2ITpwXfS5x4Gc5omdNsGWSSk N69g2EpJygjlmcQJxDpmiNYOBF6BCejF3xTqnH+fKDqXDhW0NiRaI8k0kNz4Olj9fQ C12dyYo18BBkE+AmwUYi/TPEGYW6ucwkYj6zmy936PcpeTJW/FO6sAgICPbNEb8gjs I8QWgJrw94jLabwEz/THb1K7YVEVRIuO34YVNPp0SsWV3yx5tSbzcBlscsQ1ctQkoQ oDcZmqWOiWl9M5ydW8t62dSKaPLo0t1UmNnpehPz8MdhWA0s8YDgDSgz24F73bXrzJ keV5P8r8Ey74A== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 09/23] scsi: sd: Do not issue commands to suspended disks on shutdown Date: Sat, 23 Sep 2023 09:29:18 +0900 Message-ID: <20230923002932.1082348-10-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org If an error occurs when resuming a host adapter before the devices attached to the adapter are resumed, the adapter low level driver may remove the scsi host, resulting in a call to sd_remove() for the disks of the host. This in turn results in a call to sd_shutdown() which will issue a synchronize cache command and a start stop unit command to spindown the disk. sd_shutdown() issues the commands only if the device is not already runtime suspended but does not check the power state for system-wide suspend/resume. That is, the commands may be issued with the device in a suspended state, which causes PM resume to hang, forcing a reset of the machine to recover. Fix this by tracking the suspended state of a disk using the sicsi_disk suspended flag and by not calling sd_shutdown() in sd_remove() if the disk is not running. Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal --- drivers/scsi/sd.c | 17 +++++++++++++---- drivers/scsi/sd.h | 1 + 2 files changed, 14 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a1ef4eef904f..bff8663be7e0 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3741,7 +3741,8 @@ static int sd_remove(struct device *dev) device_del(&sdkp->disk_dev); del_gendisk(sdkp->disk); - sd_shutdown(dev); + if (!sdkp->suspended) + sd_shutdown(dev); put_disk(sdkp->disk); return 0; @@ -3872,6 +3873,9 @@ static int sd_suspend_common(struct device *dev, bool runtime) ret = 0; } + if (!ret) + sdkp->suspended = 1; + return ret; } @@ -3891,21 +3895,26 @@ static int sd_suspend_runtime(struct device *dev) static int sd_resume(struct device *dev, bool runtime) { struct scsi_disk *sdkp = dev_get_drvdata(dev); - int ret; + int ret = 0; if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ return 0; - if (!sd_do_start_stop(sdkp->device, runtime)) + if (!sd_do_start_stop(sdkp->device, runtime)) { + sdkp->suspended = 0; return 0; + } if (!sdkp->device->no_start_on_resume) { sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); ret = sd_start_stop_device(sdkp, 1); } - if (!ret) + if (!ret) { opal_unlock_from_suspend(sdkp->opal_dev); + sdkp->suspended = 0; + } + return ret; } diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index 5eea762f84d1..4d42392fae07 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -150,6 +150,7 @@ struct scsi_disk { unsigned urswrz : 1; unsigned security : 1; unsigned ignore_medium_access_errors : 1; + unsigned suspended : 1; }; #define to_scsi_disk(obj) container_of(obj, struct scsi_disk, disk_dev) From patchwork Sat Sep 23 00:29:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725822 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82612CE7A89 for ; Sat, 23 Sep 2023 00:30:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230502AbjIWAaE (ORCPT ); Fri, 22 Sep 2023 20:30:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230483AbjIWA35 (ORCPT ); Fri, 22 Sep 2023 20:29:57 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D70571AD; Fri, 22 Sep 2023 17:29:51 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B1D2C433CB; Sat, 23 Sep 2023 00:29:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428991; bh=gRfGxVc1daq/nrFb0KHKXOqTTy7EybTfeFXo5KQ/LCU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XWhoMQCcucj5yOJ1HA+xVpjuCsPuiMmBr5TJIj7vhxfBRDB4wqlbR03/VQADIQ/yJ Pf6XV1gnv85uNC4iIATV+GE+zRzkhufd2jd/wNKoiKjbbOgpxk9OZFUCS2qopB06oy mS0SU9PlYdZh6wbOXS7wEll7DRfj3qyo0zXOE473XtcIx52mNSvdeAwVoSrKdEcBeT Wa94HjgCBzOPnudPqNT5c+eAGSKWwKEiue4aNTkx7mohin9mjWiXRe6BpTDymdD+9p QhnhinC1YuIRd/ufAby25Btug/PaIV06RVLFTAcjvXbWtYaIMZVjuci0tppGbe8ACq LP17ibeIDPxPg== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 11/23] ata: libata-eh: Fix compilation warning in ata_eh_link_report() Date: Sat, 23 Sep 2023 09:29:20 +0900 Message-ID: <20230923002932.1082348-12-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The 6 bytes length of the tries_buf string in ata_eh_link_report() is too short and results in a gcc compilation warning with W-!: drivers/ata/libata-eh.c: In function ‘ata_eh_link_report’: drivers/ata/libata-eh.c:2371:59: warning: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 4 [-Wformat-truncation=] 2371 | snprintf(tries_buf, sizeof(tries_buf), " t%d", | ^~ drivers/ata/libata-eh.c:2371:56: note: directive argument in the range [-2147483648, 4] 2371 | snprintf(tries_buf, sizeof(tries_buf), " t%d", | ^~~~~~ drivers/ata/libata-eh.c:2371:17: note: ‘snprintf’ output between 4 and 14 bytes into a destination of size 6 2371 | snprintf(tries_buf, sizeof(tries_buf), " t%d", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2372 | ap->eh_tries); | ~~~~~~~~~~~~~ Avoid this warning by increasing the string size to 16B. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-eh.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index b1b2c276371e..5686353e442c 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2332,7 +2332,7 @@ static void ata_eh_link_report(struct ata_link *link) struct ata_eh_context *ehc = &link->eh_context; struct ata_queued_cmd *qc; const char *frozen, *desc; - char tries_buf[6] = ""; + char tries_buf[16] = ""; int tag, nr_failed = 0; if (ehc->i.flags & ATA_EHI_QUIET) From patchwork Sat Sep 23 00:29:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725821 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7003BCE7A8A for ; Sat, 23 Sep 2023 00:30:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230496AbjIWAaN (ORCPT ); Fri, 22 Sep 2023 20:30:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230400AbjIWAaB (ORCPT ); Fri, 22 Sep 2023 20:30:01 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E31E81B1; Fri, 22 Sep 2023 17:29:54 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5923AC433CA; Sat, 23 Sep 2023 00:29:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428994; bh=i53gQ+Lr/JuCuomsAY5dyzfYwQoVwT6EWp2YtfsfRSY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xp1c0JH7dgs2rQ2E/YOfk2Z5Oldo2PXEIdpxzMhn4mUNq/fezkWrLVP75in/d/I69 /YFDYAgZhdeWJlKF1ClkkwzSsG9ngCLkE5vVYJERS8XzxKk3gA8yqkq4Ark/y+9O3X ehGl0LhOZPIQrVxOnGoIDUSE8ftbwK/sB6MYogvR3Q8R1Dd/H98DRFzLFlZpgl1ot+ z1MFRpnvDSgyuiWUFHSq9Yo8Q5rMZtPVwu1uGiAVAtWxDKRiLNlm0EAFKp9OWd2MrN JPAFIZUbcp35ORMQkTuuRIKn31opvIdFj3pjoOGPup7w4bXu4TTMxfJS2sEFOn+nji FC5OCbOvMwhaQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 13/23] ata: libata-scsi: Cleanup ata_scsi_start_stop_xlat() Date: Sat, 23 Sep 2023 09:29:22 +0900 Message-ID: <20230923002932.1082348-14-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Now that libata does its own internal device power mode management through libata EH, the scsi disk driver will not issue START STOP UNIT commands anymore. We can receive this command only from user passthrough operations. So there is no need to consider the system state and ATA port flags for suspend to translate the command. Since setting up the taskfile for the verify and standby immediate commands is the same as done in ata_dev_power_set_active() and ata_dev_power_set_standby(), factor out this code into the helper function ata_dev_power_init_tf() to simplify ata_scsi_start_stop_xlat() as well as ata_dev_power_set_active() and ata_dev_power_set_standby(). Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 55 +++++++++++++++++++++++---------------- drivers/ata/libata-scsi.c | 53 +++++++------------------------------ drivers/ata/libata.h | 2 ++ 3 files changed, 44 insertions(+), 66 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index d8cc1e27a125..8e326a445765 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1972,6 +1972,35 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, return rc; } +bool ata_dev_power_init_tf(struct ata_device *dev, struct ata_taskfile *tf, + bool set_active) +{ + /* Only applies to ATA and ZAC devices */ + if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) + return false; + + ata_tf_init(dev, tf); + tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; + tf->protocol = ATA_PROT_NODATA; + + if (set_active) { + /* VERIFY for 1 sector at lba=0 */ + tf->command = ATA_CMD_VERIFY; + tf->nsect = 1; + if (dev->flags & ATA_DFLAG_LBA) { + tf->flags |= ATA_TFLAG_LBA; + tf->device |= ATA_LBA; + } else { + /* CHS */ + tf->lbal = 0x1; /* sect */ + } + } else { + tf->command = ATA_CMD_STANDBYNOW1; + } + + return true; +} + /** * ata_dev_power_set_standby - Set a device power mode to standby * @dev: target device @@ -1988,10 +2017,6 @@ void ata_dev_power_set_standby(struct ata_device *dev) struct ata_taskfile tf; unsigned int err_mask; - /* Issue STANDBY IMMEDIATE command only if supported by the device */ - if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) - return; - /* * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5) * causing some drives to spin up and down again. For these, do nothing @@ -2005,10 +2030,9 @@ void ata_dev_power_set_standby(struct ata_device *dev) system_entering_hibernation()) return; - ata_tf_init(dev, &tf); - tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; - tf.protocol = ATA_PROT_NODATA; - tf.command = ATA_CMD_STANDBYNOW1; + /* Issue STANDBY IMMEDIATE command only if supported by the device */ + if (!ata_dev_power_init_tf(dev, &tf, false)) + return; ata_dev_notice(dev, "Entering standby power mode\n"); @@ -2038,22 +2062,9 @@ void ata_dev_power_set_active(struct ata_device *dev) * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only * if supported by the device. */ - if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) + if (!ata_dev_power_init_tf(dev, &tf, true)) return; - ata_tf_init(dev, &tf); - tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; - tf.protocol = ATA_PROT_NODATA; - tf.command = ATA_CMD_VERIFY; - tf.nsect = 1; - if (dev->flags & ATA_DFLAG_LBA) { - tf.flags |= ATA_TFLAG_LBA; - tf.device |= ATA_LBA; - } else { - /* CHS */ - tf.lbal = 0x1; /* sect */ - } - ata_dev_notice(dev, "Entering active power mode\n"); err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 576bb51cb480..ad6dbb31a163 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1202,7 +1202,6 @@ EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; - struct ata_taskfile *tf = &qc->tf; const u8 *cdb = scmd->cmnd; u16 fp; u8 bp = 0xff; @@ -1212,54 +1211,24 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) goto invalid_fld; } - tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; - tf->protocol = ATA_PROT_NODATA; - if (cdb[1] & 0x1) { - ; /* ignore IMMED bit, violates sat-r05 */ - } + /* LOEJ bit set not supported */ if (cdb[4] & 0x2) { fp = 4; bp = 1; - goto invalid_fld; /* LOEJ bit set not supported */ + goto invalid_fld; } + + /* Power conditions not supported */ if (((cdb[4] >> 4) & 0xf) != 0) { fp = 4; bp = 3; - goto invalid_fld; /* power conditions not supported */ + goto invalid_fld; } - if (cdb[4] & 0x1) { - tf->nsect = 1; /* 1 sector, lba=0 */ - - if (qc->dev->flags & ATA_DFLAG_LBA) { - tf->flags |= ATA_TFLAG_LBA; - - tf->lbah = 0x0; - tf->lbam = 0x0; - tf->lbal = 0x0; - tf->device |= ATA_LBA; - } else { - /* CHS */ - tf->lbal = 0x1; /* sect */ - tf->lbam = 0x0; /* cyl low */ - tf->lbah = 0x0; /* cyl high */ - } - - tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ - } else { - /* Some odd clown BIOSen issue spindown on power off (ACPI S4 - * or S5) causing some drives to spin up and down again. - */ - if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && - system_state == SYSTEM_POWER_OFF) - goto skip; - - if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && - system_entering_hibernation()) - goto skip; - - /* Issue ATA STANDBY IMMEDIATE command */ - tf->command = ATA_CMD_STANDBYNOW1; + /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ + if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { + ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); + return 1; } /* @@ -1274,12 +1243,8 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) invalid_fld: ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); return 1; - skip: - scmd->result = SAM_STAT_GOOD; - return 1; } - /** * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command * @qc: Storage for translated ATA taskfile diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 05ac80da8ebc..5c685bb1939e 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -62,6 +62,8 @@ extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags); extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, unsigned int readid_flags); extern int ata_dev_configure(struct ata_device *dev); +extern bool ata_dev_power_init_tf(struct ata_device *dev, + struct ata_taskfile *tf, bool set_active); extern void ata_dev_power_set_standby(struct ata_device *dev); extern void ata_dev_power_set_active(struct ata_device *dev); extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit); From patchwork Sat Sep 23 00:29:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725820 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CC12CE7A88 for ; Sat, 23 Sep 2023 00:30:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230503AbjIWAaZ (ORCPT ); Fri, 22 Sep 2023 20:30:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230483AbjIWAaL (ORCPT ); Fri, 22 Sep 2023 20:30:11 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F2B521B8; Fri, 22 Sep 2023 17:29:57 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66629C433CB; Sat, 23 Sep 2023 00:29:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428997; bh=nRftvtXnga/jrlbpRmeNLEXg+UJSvM6XOdo4yjkCmUg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JA8QrhUH8Pq002FQd1A8AodNCB8sI3nqGmBaa58UoAogqXDBlzQiMsDUy3RSSRwjx NHY836uHaXzQRGRRon2/+4bpqBtr/dfG/n+JXBDYYbfBZwRAFU5spX20U4uJS33qpj hqJu6wSalNkQYjj5mYgC/+UnpEBiYOjKPKYnSWaZ7gO5P6XLdxG/OO1dq8DU6AQEe0 7dpGwnSTjchVN7wVM5OO1410/DvNnHw4xzTI7r6mrURxziCLy1+Kz59M6GILEohjC0 FD4w8PHo9qd96GUBaoB2egTYf0NSctnBK/3tOf1NLMGfUl0giWRWn7uHIYdNHsQnNy oB6M49aGj8bVQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 15/23] ata: libata-core: Detach a port devices on shutdown Date: Sat, 23 Sep 2023 09:29:24 +0900 Message-ID: <20230923002932.1082348-16-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Modify ata_pci_shutdown_one() to schedule EH to unload a port devices before freezing and thawing the port. This ensures that drives are cleanly disabled and transitioned to standby power mode when a PCI adapter is removed or the system is powered off. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index de661780a31e..6b38ebaad019 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6164,10 +6164,24 @@ EXPORT_SYMBOL_GPL(ata_pci_remove_one); void ata_pci_shutdown_one(struct pci_dev *pdev) { struct ata_host *host = pci_get_drvdata(pdev); + struct ata_port *ap; + unsigned long flags; int i; + /* Tell EH to disable all devices */ for (i = 0; i < host->n_ports; i++) { - struct ata_port *ap = host->ports[i]; + ap = host->ports[i]; + spin_lock_irqsave(ap->lock, flags); + ap->pflags |= ATA_PFLAG_UNLOADING; + ata_port_schedule_eh(ap); + spin_unlock_irqrestore(ap->lock, flags); + } + + for (i = 0; i < host->n_ports; i++) { + ap = host->ports[i]; + + /* Wait for EH to complete before freezing the port */ + ata_port_wait_eh(ap); ap->pflags |= ATA_PFLAG_FROZEN; From patchwork Sat Sep 23 00:29:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725819 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D2CECE7A89 for ; Sat, 23 Sep 2023 00:30:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231149AbjIWAaz (ORCPT ); Fri, 22 Sep 2023 20:30:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230511AbjIWAaL (ORCPT ); Fri, 22 Sep 2023 20:30:11 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8562C1BE; Fri, 22 Sep 2023 17:29:59 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E70B4C433CA; Sat, 23 Sep 2023 00:29:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695428999; bh=WrQnUDqGdBfHxfyHbGXnZd/U0ECxKurpC+XZ4MifIbo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hQjraA6nMVGAQCOV3mTX8CPNg93LBW++d6Cq6vfaVlQufeDyFTpfARMH+3lhfLOe3 Ehx4oOY/x1LGelneyV7WfJN3Toa+yGMihLO5jpVRyMIXRl7edULWIQn9fiLAuPCFo/ UDvqrSERSjjeaGhWMHOn06/Otd790ksu25Q8gsDbPLBeKlL4yhk4tfZRtLs0baNsSY cE99Fcx4MmFDpKcrfDtVN7GCe1MCxC5/R+RH1M/YqzNvpTP7Eu/fzRWEN1es5KtMq7 SkfMArJD7PX6XsKVfXfQqY7gVtVX/aYuLomhWs8Mk3uUb8pQoUYWdYDUy/BNovin4J OPy3YY8p5bikQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 16/23] ata: libata-core: Remove ata_port_suspend_async() Date: Sat, 23 Sep 2023 09:29:25 +0900 Message-ID: <20230923002932.1082348-17-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org ata_port_suspend_async() is only called by ata_sas_port_suspend(). Modify ata_port_suspend() with an additional bool argument indicating an asynchronous or synchronous suspend to allow removing that helper function. With this change, the variable ata_port_resume_ehi can also be removed and its value (ATA_EHI_XXX flags passed directly to ata_port_request_pm(). Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 46 +++++++++++++++------------------------ 1 file changed, 17 insertions(+), 29 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 6b38ebaad019..291fc686ff08 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5166,18 +5166,8 @@ static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, ata_port_wait_eh(ap); } -/* - * On some hardware, device fails to respond after spun down for suspend. As - * the device won't be used before being resumed, we don't need to touch the - * device. Ask EH to skip the usual stuff and proceed directly to suspend. - * - * http://thread.gmane.org/gmane.linux.ide/46764 - */ -static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET - | ATA_EHI_NO_AUTOPSY - | ATA_EHI_NO_RECOVERY; - -static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) +static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg, + bool async) { /* * We are about to suspend the port, so we do not care about @@ -5187,20 +5177,18 @@ static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) */ cancel_delayed_work_sync(&ap->scsi_rescan_task); - ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false); -} - -static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg) -{ /* - * We are about to suspend the port, so we do not care about - * scsi_rescan_device() calls scheduled by previous resume operations. - * The next resume will schedule the rescan again. So cancel any rescan - * that is not done yet. + * On some hardware, device fails to respond after spun down for + * suspend. As the device will not be used until being resumed, we + * do not need to touch the device. Ask EH to skip the usual stuff + * and proceed directly to suspend. + * + * http://thread.gmane.org/gmane.linux.ide/46764 */ - cancel_delayed_work_sync(&ap->scsi_rescan_task); - - ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true); + ata_port_request_pm(ap, mesg, 0, + ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY | + ATA_EHI_NO_RECOVERY, + async); } static int ata_port_pm_suspend(struct device *dev) @@ -5210,7 +5198,7 @@ static int ata_port_pm_suspend(struct device *dev) if (pm_runtime_suspended(dev)) return 0; - ata_port_suspend(ap, PMSG_SUSPEND); + ata_port_suspend(ap, PMSG_SUSPEND, false); return 0; } @@ -5221,13 +5209,13 @@ static int ata_port_pm_freeze(struct device *dev) if (pm_runtime_suspended(dev)) return 0; - ata_port_suspend(ap, PMSG_FREEZE); + ata_port_suspend(ap, PMSG_FREEZE, false); return 0; } static int ata_port_pm_poweroff(struct device *dev) { - ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE); + ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false); return 0; } @@ -5279,7 +5267,7 @@ static int ata_port_runtime_idle(struct device *dev) static int ata_port_runtime_suspend(struct device *dev) { - ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND); + ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND, false); return 0; } @@ -5309,7 +5297,7 @@ static const struct dev_pm_ops ata_port_pm_ops = { */ void ata_sas_port_suspend(struct ata_port *ap) { - ata_port_suspend_async(ap, PMSG_SUSPEND); + ata_port_suspend(ap, PMSG_SUSPEND, true); } EXPORT_SYMBOL_GPL(ata_sas_port_suspend); From patchwork Sat Sep 23 00:29:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725818 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 44316CE7A89 for ; Sat, 23 Sep 2023 00:31:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231195AbjIWAbO (ORCPT ); Fri, 22 Sep 2023 20:31:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230500AbjIWAaY (ORCPT ); Fri, 22 Sep 2023 20:30:24 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29828100; Fri, 22 Sep 2023 17:30:04 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8887DC433CA; Sat, 23 Sep 2023 00:30:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695429003; bh=R1tYu+zCjKRGxXsPNNRChzgkkzMhM2utM9Va0s9nexk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j7Wx735FpPuC6iNZRsycLaS4THuALzrj5qhaqJTiwx+T2iaoIkTv+nDHwX5pbaHDp Kol5VqS+kfHaDcRbjEi6EX0qnitsZCbejDBNXSbVph4GdvLGH9eDl+8Qzu5MRoiGmn 3aNhYj8IJRE8Y8UVcOMvlNwbXds/bvMQ/NlUkE+tTSvxNZQnxrf/hPEJm7RMH3/M1K 77zYWpae0L2oHfE7Fj9PabcG/a4RmuXaUJyEFFbaWS/+xYGiQ3PvJyGbVroWke3oER kuno2zrQUSCBKuXo91wnm1/6HyaSdGIMhMFP4uHl7X88HuGRY0eqUqzZF5TOvluTsx R8QKH3lSrRzvw== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 19/23] ata: libata-core: Do not resume runtime suspended ports Date: Sat, 23 Sep 2023 09:29:28 +0900 Message-ID: <20230923002932.1082348-20-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The scsi disk driver does not resume disks that have been runtime suspended by the user. To be consistent with this behavior, do the same for ata ports and skip the PM request in ata_port_pm_resume() if the port was already runtime suspended. With this change, it is no longer necessary to force the PM state of the port to ACTIVE as the PM core code will take care of that when handling runtime resume. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index df6ed386e6fc..58f03031a259 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5230,10 +5230,8 @@ static void ata_port_resume(struct ata_port *ap, pm_message_t mesg, static int ata_port_pm_resume(struct device *dev) { - ata_port_resume(to_ata_port(dev), PMSG_RESUME, true); - pm_runtime_disable(dev); - pm_runtime_set_active(dev); - pm_runtime_enable(dev); + if (!pm_runtime_suspended(dev)) + ata_port_resume(to_ata_port(dev), PMSG_RESUME, true); return 0; } From patchwork Sat Sep 23 00:29:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725817 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5805CE7A8D for ; Sat, 23 Sep 2023 00:31:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230509AbjIWAbR (ORCPT ); Fri, 22 Sep 2023 20:31:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39920 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230506AbjIWAaf (ORCPT ); Fri, 22 Sep 2023 20:30:35 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2FAEF1A7; Fri, 22 Sep 2023 17:30:07 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95590C433C7; Sat, 23 Sep 2023 00:30:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695429006; bh=ivSqt8eYECZ8WOxEKDAq1kGxxTWXRhFriR2bEOYAGzA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RtjK9oKnQM0YI4+Nhp8vTUU/5jw7MUvkgDoLdXvad2czR+Sx0tCO3xSzNQ5scloGA sXMwNbzAZVEfk3dUR1rbso3xgN+d9fqW5kVGsFr8oFcEei6KRC+75BrcXAUAZFv4mS c2m5N592NJw6Ia5JmbmpzkKCEQZ6fOe9HZBc0CS/ob7Y4sU+NETDhXdgK+V41wQtwl fz9CHY5rCXyQYGIWS0odMLRrIy/4PUIVQ+H8mTMVRidRASMJieUwvHBCZEyFbNRIx6 9MqXtFtYwQwLXdv2ire7cnfvGz1k0X818/jC1XGBUyjwlm+fdPepGBZwGvb2meffft riR0Bjf+HRtOQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 21/23] ata: libata-eh: Improve reset error messages Date: Sat, 23 Sep 2023 09:29:30 +0900 Message-ID: <20230923002932.1082348-22-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Some drives are really slow to spinup on resume, resulting is a very slow response to COMRESET and to error messages such as: ata1: COMRESET failed (errno=-16) ata1: link is slow to respond, please be patient (ready=0) ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300) ata1.00: configured for UDMA/133 Given that the slowness of the response is indicated with the message "link is slow to respond..." and that resets are retried until the device is detected as online after up to 1min (ata_eh_reset_timeouts), there is no point in printing the "COMRESET failed" error message. Let's not scare the user with non fatal errors and only warn about reset failures in ata_eh_reset() when all reset retries have been exhausted. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-eh.c | 2 ++ drivers/ata/libata-sata.c | 1 - 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 5686353e442c..67387d602735 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2909,6 +2909,8 @@ int ata_eh_reset(struct ata_link *link, int classify, */ if (ata_is_host_link(link)) ata_eh_thaw_port(ap); + ata_link_warn(link, "%s failed\n", + reset == hardreset ? "hardreset" : "softreset"); goto out; } diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c index 83a9497e48e1..b6656c287175 100644 --- a/drivers/ata/libata-sata.c +++ b/drivers/ata/libata-sata.c @@ -621,7 +621,6 @@ int sata_link_hardreset(struct ata_link *link, const unsigned int *timing, /* online is set iff link is online && reset succeeded */ if (online) *online = false; - ata_link_err(link, "COMRESET failed (errno=%d)\n", rc); } return rc; } From patchwork Sat Sep 23 00:29:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 725816 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60F99CE7A81 for ; Sat, 23 Sep 2023 00:31:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231138AbjIWAbT (ORCPT ); Fri, 22 Sep 2023 20:31:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231136AbjIWAax (ORCPT ); Fri, 22 Sep 2023 20:30:53 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4A2C1B0; Fri, 22 Sep 2023 17:30:08 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 217B0C433C9; Sat, 23 Sep 2023 00:30:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695429008; bh=zkev2ircY3fnbSzJ0bCWRHN59K1mwL4l6wGAngimylw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kS4h11z6UqxH/cHJGYC2xIy6Ls7dmPTD1th+A/oKyMeeyqzTlwkiedMoxJ2AhcPfl siXB803wypcEb4NqaMSYNQcLWETNT6C3tZDonxjba9/OQfdcM45KDgyqkD+R0hHAgw 3rvsipyHoIP7q1UKhUfcU+VdfW0IHZiMCbcT+dKqDp3UTEv5bY+i6QiZA0p7jY+IfW oCxVDiQOI5JVsCTFOxKjMDoCdPiuOQex8sVnsiN4UXAxqpsXOV/RXm9WADh3NED1yP x17l9S9iulg+RcEW+h6rnJtepKQ5Y+FgdLWxAX9KrTYlhLDgSkcflG4VzsaQCCv+M3 b/4RTHdoN3Whw== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v6 22/23] ata: libata-eh: Reduce "disable device" message verbosity Date: Sat, 23 Sep 2023 09:29:31 +0900 Message-ID: <20230923002932.1082348-23-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230923002932.1082348-1-dlemoal@kernel.org> References: <20230923002932.1082348-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org There is no point in warning about a device being disabled when we expect it to be, that is, on suspend, shutdown or when detaching the device. Suppress the message "disable device" for these cases by introducing the EH static function ata_eh_dev_disable() and by using it in ata_eh_unload() and ata_eh_detach_dev(). ata_dev_disable() code is modified to call this new function after printing the "disable device" message. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-eh.c | 32 +++++++++++++++++++------------- 1 file changed, 19 insertions(+), 13 deletions(-) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 67387d602735..945675f6b822 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -494,6 +494,18 @@ void ata_eh_release(struct ata_port *ap) mutex_unlock(&ap->host->eh_mutex); } +static void ata_eh_dev_disable(struct ata_device *dev) +{ + ata_acpi_on_disable(dev); + ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); + dev->class++; + + /* From now till the next successful probe, ering is used to + * track probe failures. Clear accumulated device error info. + */ + ata_ering_clear(&dev->ering); +} + static void ata_eh_unload(struct ata_port *ap) { struct ata_link *link; @@ -517,8 +529,8 @@ static void ata_eh_unload(struct ata_port *ap) */ ata_for_each_link(link, ap, PMP_FIRST) { sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); - ata_for_each_dev(dev, link, ALL) - ata_dev_disable(dev); + ata_for_each_dev(dev, link, ENABLED) + ata_eh_dev_disable(dev); } /* freeze and set UNLOADED */ @@ -1211,14 +1223,8 @@ void ata_dev_disable(struct ata_device *dev) return; ata_dev_warn(dev, "disable device\n"); - ata_acpi_on_disable(dev); - ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); - dev->class++; - /* From now till the next successful probe, ering is used to - * track probe failures. Clear accumulated device error info. - */ - ata_ering_clear(&dev->ering); + ata_eh_dev_disable(dev); } EXPORT_SYMBOL_GPL(ata_dev_disable); @@ -1240,12 +1246,12 @@ void ata_eh_detach_dev(struct ata_device *dev) /* * If the device is still enabled, transition it to standby power mode - * (i.e. spin down HDDs). + * (i.e. spin down HDDs) and disable it. */ - if (ata_dev_enabled(dev)) + if (ata_dev_enabled(dev)) { ata_dev_power_set_standby(dev); - - ata_dev_disable(dev); + ata_eh_dev_disable(dev); + } spin_lock_irqsave(ap->lock, flags);