From patchwork Tue Sep 26 08:14:53 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: 727030 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 8BF6FE7D258 for ; Tue, 26 Sep 2023 08:15:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233979AbjIZIPp (ORCPT ); Tue, 26 Sep 2023 04:15:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231140AbjIZIPg (ORCPT ); Tue, 26 Sep 2023 04:15:36 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D2A4FC; Tue, 26 Sep 2023 01:15:28 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 91CD4C433C7; Tue, 26 Sep 2023 08:15:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695716128; bh=2w/6rA2GHOKalsTPwz93JFAq7sA7uKKP+M6htVhEBPE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qjen2LN4oY6UvhI+2/5qhMdt1a4EVjG5OnZkJ1A3JoXfk8t+lwh1KZZ3aGqdeyeE1 pbi8PrL6zmH8w3KnEBQsv8D9R2VpXign3tqH+cqGTw3+g1npLV7Quw5CQETTu9VnSG +EYdQZqaCDAIBsOLB/QWhu1Z8hxegFORrjxvB/eIpYWZW2BqSxHKH6mezY1cp3GEOz L+hkSBDLoy4TUnpbCOz7dRNDDLAPcbrlQX0UJwDKc5hAwxR8NHKf4bnnrStaKitIFU J1nnK0whJ5ybepBd4dnqFrSsmQd8AbJbEMIxIOlQMF3Eoj3b9MD3u5fB6U31uZocIn 5i06oLIQ8wXng== 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 v7 09/23] scsi: sd: Do not issue commands to suspended disks on shutdown Date: Tue, 26 Sep 2023 17:14:53 +0900 Message-ID: <20230926081507.69346-10-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230926081507.69346-1-dlemoal@kernel.org> References: <20230926081507.69346-1-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 by introducing the suspended boolean field in the scsi_disk structure. This flag is set to true when the disk is suspended is sd_suspend_common() and resumed with sd_resume(). When suspended is true, sd_shutdown() is not executed from sd_remove(). 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..f911a64521e6 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 = true; + 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 = false; 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 = false; + } + return ret; } diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index 5eea762f84d1..14153ef7a414 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -131,6 +131,7 @@ struct scsi_disk { u8 provisioning_mode; u8 zeroing_mode; u8 nr_actuators; /* Number of actuators */ + bool suspended; /* Disk is supended (stopped) */ unsigned ATO : 1; /* state of disk ATO bit */ unsigned cache_override : 1; /* temp override of WCE,RCD */ unsigned WCE : 1; /* state of disk WCE bit */