linux-kernel - [PATCH v3] scsi: ufs: core: changing the status to check inflight

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Message-Id: <20240411071444.51873-1-hy50.seo@samsung.com>
Date: Thu, 11 Apr 2024 16:14:44 +0900
From: SEO HOYOUNG <hy50.seo@...sung.com>
To: linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	alim.akhtar@...sung.com, avri.altman@....com, jejb@...ux.ibm.com,
	martin.petersen@...cle.com, beanhuo@...ron.com, bvanassche@....org,
	kwangwon.min@...sung.com, kwmad.kim@...sung.com, sh425.lee@...sung.com,
	quic_nguyenb@...cinc.com, cpgs@...sung.com, h10.kim@...sung.com
Cc: SEO HOYOUNG <hy50.seo@...sung.com>
Subject: [PATCH v3] scsi: ufs: core: changing the status to check inflight

ufshcd_cmd_inflight() is used to check whether or not a command is
in progress.
Make it skip commands that have already completed by changing the
!blk_mq_request_started(rq) check into blk_mq_rq_state(rq)
!= MQ_RQ_IN_FLIGHT.
We cannot rely on lrbp->cmd since lrbp->cmd is not cleared
when a command completes.

v1 -> v2: convert the two return statements into a single return statement
And modified comment of commit

v2 -> v3: remove superfluous parentheses in the above return statement

Link: https://lore.kernel.org/linux-scsi/20230517223157.1068210-3-bvanassche@acm.org/
Signed-off-by: SEO HOYOUNG <hy50.seo@...sung.com>
---
 drivers/ufs/core/ufshcd.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 21429eec1b82..a99f7ab85f12 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -3082,16 +3082,7 @@ static int ufshcd_compose_dev_cmd(struct ufs_hba *hba,
  */
 bool ufshcd_cmd_inflight(struct scsi_cmnd *cmd)
 {
-	struct request *rq;
-
-	if (!cmd)
-		return false;
-
-	rq = scsi_cmd_to_rq(cmd);
-	if (!blk_mq_request_started(rq))
-		return false;
-
-	return true;
+	return cmd && blk_mq_rq_state(scsi_cmd_to_rq(cmd)) == MQ_RQ_IN_FLIGHT;
 }
 
 /*
-- 
2.26.0