From patchwork Tue Jun 21 11:15:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 583800 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 60793CCA483 for ; Tue, 21 Jun 2022 11:22:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349175AbiFULWM (ORCPT ); Tue, 21 Jun 2022 07:22:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348928AbiFULWK (ORCPT ); Tue, 21 Jun 2022 07:22:10 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C24342A264; Tue, 21 Jun 2022 04:22:08 -0700 (PDT) Received: from fraeml745-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4LS3sg57ktz687S7; Tue, 21 Jun 2022 19:18:15 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml745-chm.china.huawei.com (10.206.15.226) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 21 Jun 2022 13:22:06 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 21 Jun 2022 12:22:01 +0100 From: John Garry To: , , , , , , , , , CC: , , , , , , , , , , John Garry Subject: [PATCH v2 1/6] scsi: core: Remove reserved request time-out handling Date: Tue, 21 Jun 2022 19:15:38 +0800 Message-ID: <1655810143-67784-2-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1655810143-67784-1-git-send-email-john.garry@huawei.com> References: <1655810143-67784-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The SCSI core code does not currently support reserved commands. As such, requests which time-out would never be reserved, and scsi_timeout() 'reserved' arg should never be set. Remove handling for reserved requests, drop the wrapper scsi_timeout() as it now just calls scsi_times_out() always, and finally rename scsi_times_out() -> scsi_timeout() to match the blk_mq_ops method name. Signed-off-by: John Garry Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke --- Documentation/scsi/scsi_eh.rst | 3 +-- Documentation/scsi/scsi_mid_low_api.rst | 2 +- drivers/scsi/scsi_error.c | 7 ++++--- drivers/scsi/scsi_lib.c | 8 -------- drivers/scsi/scsi_priv.h | 3 ++- 5 files changed, 8 insertions(+), 15 deletions(-) diff --git a/Documentation/scsi/scsi_eh.rst b/Documentation/scsi/scsi_eh.rst index 885395dc1f15..bad624fab823 100644 --- a/Documentation/scsi/scsi_eh.rst +++ b/Documentation/scsi/scsi_eh.rst @@ -87,8 +87,7 @@ with the command. 1.2.2 Completing a scmd w/ timeout ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -The timeout handler is scsi_times_out(). When a timeout occurs, this -function +The timeout handler is scsi_timeout(). When a timeout occurs, this function 1. invokes optional hostt->eh_timed_out() callback. Return value can be one of diff --git a/Documentation/scsi/scsi_mid_low_api.rst b/Documentation/scsi/scsi_mid_low_api.rst index 63ddea2b9640..a8c5bd15a440 100644 --- a/Documentation/scsi/scsi_mid_low_api.rst +++ b/Documentation/scsi/scsi_mid_low_api.rst @@ -731,7 +731,7 @@ Details:: * Notes: If 'no_async_abort' is defined this callback * will be invoked from scsi_eh thread. No other commands * will then be queued on current host during eh. - * Otherwise it will be called whenever scsi_times_out() + * Otherwise it will be called whenever scsi_timeout() * is called due to a command timeout. * * Optionally defined in: LLD diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 49ef864df581..a8b71b73a5a5 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -139,7 +139,7 @@ static bool scsi_eh_should_retry_cmd(struct scsi_cmnd *cmd) * * Note: this function must be called only for a command that has timed out. * Because the block layer marks a request as complete before it calls - * scsi_times_out(), a .scsi_done() call from the LLD for a command that has + * scsi_timeout(), a .scsi_done() call from the LLD for a command that has * timed out do not have any effect. Hence it is safe to call * scsi_finish_command() from this function. */ @@ -316,8 +316,9 @@ void scsi_eh_scmd_add(struct scsi_cmnd *scmd) } /** - * scsi_times_out - Timeout function for normal scsi commands. + * scsi_timeout - Timeout function for normal scsi commands. * @req: request that is timing out. + * @reserved: whether the request is a reserved request. * * Notes: * We do not need to lock this. There is the potential for a race @@ -325,7 +326,7 @@ void scsi_eh_scmd_add(struct scsi_cmnd *scmd) * normal completion function determines that the timer has already * fired, then it mustn't do anything. */ -enum blk_eh_timer_return scsi_times_out(struct request *req) +enum blk_eh_timer_return scsi_timeout(struct request *req, bool reserved) { struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req); enum blk_eh_timer_return rtn = BLK_EH_DONE; diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 6ffc9e4258a8..8eb51ef7c077 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1790,14 +1790,6 @@ static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx, return ret; } -static enum blk_eh_timer_return scsi_timeout(struct request *req, - bool reserved) -{ - if (reserved) - return BLK_EH_RESET_TIMER; - return scsi_times_out(req); -} - static int scsi_mq_init_request(struct blk_mq_tag_set *set, struct request *rq, unsigned int hctx_idx, unsigned int numa_node) { diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h index 5c4786310a31..695d0c83ffe0 100644 --- a/drivers/scsi/scsi_priv.h +++ b/drivers/scsi/scsi_priv.h @@ -72,7 +72,8 @@ extern void scsi_exit_devinfo(void); /* scsi_error.c */ extern void scmd_eh_abort_handler(struct work_struct *work); -extern enum blk_eh_timer_return scsi_times_out(struct request *req); +extern enum blk_eh_timer_return scsi_timeout(struct request *req, + bool reserved); extern int scsi_error_handler(void *host); extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd); extern void scsi_eh_wakeup(struct Scsi_Host *shost);