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[v4,07/10] scsi: ufs: Try harder to change the power mode

Message ID 20221018202958.1902564-8-bvanassche@acm.org
State New
Headers show
Series Fix a deadlock in the UFS driver | expand

Commit Message

Bart Van Assche Oct. 18, 2022, 8:29 p.m. UTC 
Instead of only retrying the START STOP UNIT command if a unit attention
is reported, repeat it if any SCSI error is reported by the device or if
the command timed out.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/ufs/core/ufshcd.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
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Patch

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index f83a0045a129..84ca17d29898 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -8776,9 +8776,11 @@  static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba,
 	for (retries = 3; retries > 0; --retries) {
 		ret = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
 				   HZ, 0, 0, RQF_PM, NULL);
-		if (!scsi_status_is_check_condition(ret) ||
-				!scsi_sense_valid(&sshdr) ||
-				sshdr.sense_key != UNIT_ATTENTION)
+		/*
+		 * scsi_execute() only returns a negative value if the request
+		 * queue is dying.
+		 */
+		if (ret <= 0)
 			break;
 	}
 	if (ret) {