linux-kernel - [PATCH 5.16 155/227] scsi: ufs: Remove dead code

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Message-Id: <20220221084939.979308283@linuxfoundation.org>
Date:   Mon, 21 Feb 2022 09:49:34 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bean Huo <beanhuo@...ron.com>,
        Avri Altman <avri.altman@....com>,
        Bart Van Assche <bvanassche@....org>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 5.16 155/227] scsi: ufs: Remove dead code

From: Bart Van Assche <bvanassche@....org>

commit d77ea8226b3be23b0b45aa42851243b62a27bda1 upstream.

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.

Link: https://lore.kernel.org/r/20211203231950.193369-6-bvanassche@acm.org
Tested-by: Bean Huo <beanhuo@...ron.com>
Reviewed-by: Bean Huo <beanhuo@...ron.com>
Acked-by: Avri Altman <avri.altman@....com>
Signed-off-by: Bart Van Assche <bvanassche@....org>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/scsi/ufs/ufshcd.c |    7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6734,11 +6734,6 @@ static int ufshcd_issue_devman_upiu_cmd(
 	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;
@@ -6806,8 +6801,8 @@ static int ufshcd_issue_devman_upiu_cmd(
 	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;