[PATCH AUTOSEL 5.15 09/23] scsi: ufs: core: Reduce the power mode change timeout

[PATCH AUTOSEL 5.15 09/23] scsi: ufs: core: Reduce the power mode change timeout

[Sasha Levin]

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

[ Upstream commit 8f2c96420c6ec3dcb18c8be923e24c6feaa5ccf6 ]

The current power mode change timeout (180 s) is so large that it can cause
a watchdog timer to fire. Reduce the power mode change timeout to 10
seconds.

Link: https://lore.kernel.org/r/20220811234401.1957911-1-bvanassche@acm.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/ufs/ufshcd.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 2f6468f22b489..dae1a85f1512c 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -8476,6 +8476,8 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba,
 	struct scsi_device *sdp;
 	unsigned long flags;
 	int ret, retries;
+	unsigned long deadline;
+	int32_t remaining;
 
 	spin_lock_irqsave(hba->host->host_lock, flags);
 	sdp = hba->sdev_ufs_device;
@@ -8508,9 +8510,14 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba,
 	 * callbacks hence set the RQF_PM flag so that it doesn't resume the
 	 * already suspended childs.
 	 */
+	deadline = jiffies + 10 * HZ;
 	for (retries = 3; retries > 0; --retries) {
+		ret = -ETIMEDOUT;
+		remaining = deadline - jiffies;
+		if (remaining <= 0)
+			break;
 		ret = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
-				START_STOP_TIMEOUT, 0, 0, RQF_PM, NULL);
+				   remaining / HZ, 0, 0, RQF_PM, NULL);
 		if (!scsi_status_is_check_condition(ret) ||
 				!scsi_sense_valid(&sshdr) ||
 				sshdr.sense_key != UNIT_ATTENTION)
-- 
2.35.1