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

Bart Van Assche
2022-10-18T20:31:22Z

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(-)

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) {