[PATCH 4/4] scsi: return BLK_STS_AGAIN for ALUA transitioning

Hannes Reinecke
2020-09-30T08:03:04Z

Whenever we encounter a sense code of ALUA transitioning in
scsi_io_completion() it means that the SCSI midlayer ran out
of retries trying to wait for ALUA transitioning.
In these cases we should be passing up the error, but signalling
that the I/O might be retried, preferably on another path.
So return BLK_STS_AGAIN in these cases.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/scsi_lib.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index b628aa0d824c..e6221d65fa8e 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -764,6 +764,9 @@ static void scsi_io_completion_action(struct scsi_cmnd *cmd, int result)
case 0x24: /* depopulation in progress */
action = ACTION_DELAYED_RETRY;
break;
+ case 0x0a: /* ALUA state transistion */
+ blk_stat = BLK_STS_AGAIN;
+ /* fall through */
default:
action = ACTION_FAIL;
break;
--
2.16.4