scsi: ufs: core: Reduce the power mode change timeout

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>

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 6bc679d..a202d7d 100644 (file)
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -8741,6 +8741,8 @@ 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->ufs_device_wlun;
@@ -8773,9 +8775,14 @@ 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)