[PATCH v5 1/3] scsi: ufs: Reduce the clock scaling latency

From: Bart Van Assche <bvanassche@acm.org>
To: "Martin K . Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org, Bart Van Assche <bvanassche@acm.org>,
	Avri Altman <avri.altman@wdc.com>,
	Stanley Chu <stanley.chu@mediatek.com>
Subject: [PATCH v5 1/3] scsi: ufs: Reduce the clock scaling latency
Date: Thu,  8 Dec 2022 15:43:56 -0800	[thread overview]
Message-ID: <20221208234358.252031-2-bvanassche@acm.org> (raw)
In-Reply-To: <20221208234358.252031-1-bvanassche@acm.org>

Wait at most 20 ms before rechecking the doorbells instead of waiting
for a potentially long time between doorbell checks.

Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/ufs/core/ufshcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 2dbe24977822..b5d9088b7de3 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -1154,7 +1154,7 @@ static int ufshcd_wait_for_doorbell_clr(struct ufs_hba *hba,
 		}
 
 		spin_unlock_irqrestore(hba->host->host_lock, flags);
-		schedule();
+		io_schedule_timeout(msecs_to_jiffies(20));
 		if (ktime_to_us(ktime_sub(ktime_get(), start)) >
 		    wait_timeout_us) {
 			timeout = true;
