Re: [PATCH 5/8] scsi: ufs: Try harder to change the power mode

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On 9/27/22 03:41, Avri Altman wrote:
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@xxxxxxx>
---
  drivers/ufs/core/ufshcd.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 02e73208b921..e8c0504e9e83 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -8784,9 +8784,9 @@ 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,
                                 START_STOP_TIMEOUT, 0, 0, RQF_PM, NULL);
-               if (!scsi_status_is_check_condition(ret) ||
-                               !scsi_sense_valid(&sshdr) ||
-                               sshdr.sense_key != UNIT_ATTENTION)
+               if (ret < 0)
+                       break;

continue?

Hi Avri,

Thanks for having taken a look. I chose "break" on purpose since the only case for which I expect scsi_execute() to return a negative value is request queue shutdown. If the request queue is being shutdown I think we should break out of the loop.

Thanks,

Bart.



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