linux-kernel - [PATCH v3 2/3] scsi: ufs: core: Remove redundant host

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Message-Id: <20241024075033.562562-3-avri.altman@wdc.com>
Date: Thu, 24 Oct 2024 10:50:32 +0300
From: Avri Altman <avri.altman@....com>
To: "Martin K . Petersen" <martin.petersen@...cle.com>
Cc: linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bart Van Assche <bvanassche@....org>,
	Avri Altman <avri.altman@....com>
Subject: [PATCH v3 2/3] scsi: ufs: core: Remove redundant host_lock calls around UTMRLCLR

There is no need to serialize single read/write calls to the host
controller registers. Remove the redundant host_lock calls that protect
access to the task management request List cLear register: UTMRLCLR.

Reviewed-by: Bart Van Assche <bvanassche@....org>
Signed-off-by: Avri Altman <avri.altman@....com>
---
 drivers/ufs/core/ufshcd.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index faea4b294bdb..c2f44834062e 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -7012,14 +7012,11 @@ static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag)
 {
 	int err = 0;
 	u32 mask = 1 << tag;
-	unsigned long flags;
 
 	if (!test_bit(tag, &hba->outstanding_tasks))
 		goto out;
 
-	spin_lock_irqsave(hba->host->host_lock, flags);
 	ufshcd_utmrl_clear(hba, tag);
-	spin_unlock_irqrestore(hba->host->host_lock, flags);
 
 	/* poll for max. 1 sec to clear door bell register by h/w */
 	err = ufshcd_wait_for_register(hba,
-- 
2.25.1