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From: Bart Van Assche <bvanassche@acm.org>
To: "Martin K . Petersen" <martin.petersen@oracle.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	linux-scsi@vger.kernel.org, Bart Van Assche <bvanassche@acm.org>,
	Avri Altman <avri.altman@wdc.com>, Bean Huo <beanhuo@micron.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	Can Guo <cang@codeaurora.org>,
	Stanley Chu <stanley.chu@mediatek.com>,
	Asutosh Das <asutoshd@codeaurora.org>
Subject: [PATCH v4 05/17] scsi: ufs: Remove dead code
Date: Fri,  3 Dec 2021 15:19:38 -0800	[thread overview]
Message-ID: <20211203231950.193369-6-bvanassche@acm.org> (raw)
In-Reply-To: <20211203231950.193369-1-bvanassche@acm.org>

Commit 7252a3603015 ("scsi: ufs: Avoid busy-waiting by eliminating tag
conflicts") guarantees that 'tag' is not in use by any SCSI command.
Remove the check that returns early if a conflict occurs.

Acked-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Tested-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/scsi/ufs/ufshcd.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 973b7b083dbe..d4996ada55b6 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6730,11 +6730,6 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 	tag = req->tag;
 	WARN_ONCE(tag < 0, "Invalid tag %d\n", tag);
 
-	if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
-		err = -EBUSY;
-		goto out;
-	}
-
 	lrbp = &hba->lrb[tag];
 	WARN_ON(lrbp->cmd);
 	lrbp->cmd = NULL;
@@ -6802,8 +6797,8 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 	ufshcd_add_query_upiu_trace(hba, err ? UFS_QUERY_ERR : UFS_QUERY_COMP,
 				    (struct utp_upiu_req *)lrbp->ucd_rsp_ptr);
 
-out:
 	blk_mq_free_request(req);
+
 out_unlock:
 	up_read(&hba->clk_scaling_lock);
 	return err;

  parent reply	other threads:[~2021-12-03 23:20 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-03 23:19 [PATCH v4 00/17] UFS patches for kernel v5.17 Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 01/17] scsi: core: Fix scsi_device_max_queue_depth() Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 02/17] scsi: ufs: Rename a function argument Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 03/17] scsi: ufs: Remove is_rpmb_wlun() Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 04/17] scsi: ufs: Remove the sdev_rpmb member Bart Van Assche
2021-12-03 23:19 ` Bart Van Assche [this message]
2021-12-03 23:19 ` [PATCH v4 06/17] scsi: ufs: Fix race conditions related to driver data Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 07/17] scsi: ufs: Remove ufshcd_any_tag_in_use() Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 08/17] scsi: ufs: Rework ufshcd_change_queue_depth() Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 09/17] scsi: ufs: Fix a deadlock in the error handler Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 10/17] scsi: ufs: Remove hba->cmd_queue Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 11/17] scsi: ufs: Remove the 'update_scaling' local variable Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 12/17] scsi: ufs: Introduce ufshcd_release_scsi_cmd() Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 13/17] scsi: ufs: Improve SCSI abort handling further Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 14/17] scsi: ufs: Fix a kernel crash during shutdown Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 15/17] scsi: ufs: Stop using the clock scaling lock in the error handler Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 16/17] scsi: ufs: Optimize the command queueing code Bart Van Assche
2021-12-06 22:41   ` Asutosh Das (asd)
2021-12-08 17:28     ` Asutosh Das (asd)
2021-12-08 17:53       ` Bart Van Assche
2021-12-14  4:04   ` Bjorn Andersson
2021-12-14  4:57     ` Bart Van Assche
2021-12-15  3:52       ` Bjorn Andersson
2021-12-15 18:44         ` Bart Van Assche
2021-12-03 23:19 ` [PATCH v4 17/17] scsi: ufs: Implement polling support Bart Van Assche
2021-12-07  3:31 ` [PATCH v4 00/17] UFS patches for kernel v5.17 Martin K. Petersen
2021-12-14  4:40 ` Martin K. Petersen
2021-12-14  7:14   ` Avri Altman
2021-12-14  7:18     ` Martin K. Petersen

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