diff mbox series

[v6,20/35] scsi: retry INQUIRY after timeout

Message ID 20221104231927.9613-21-michael.christie@oracle.com
State New
Headers show
Series Allow scsi_execute users to control retries | expand

Commit Message

Mike Christie Nov. 4, 2022, 11:19 p.m. UTC 
Description from: Martin Wilck <mwilck@suse.com>:

The SCSI mid layer doesn't retry commands after DID_TIME_OUT (see
scsi_noretry_cmd()). Packet loss in the fabric can cause spurious timeouts
during SCSI device probing, causing device probing to fail. This has been
observed in FCoE uplink failover tests, for example.

This patch fixes the issue by retrying the INQUIRY up to 3 times (in
practice, we never observed more than a single retry),

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
 drivers/scsi/scsi_scan.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index ffdb043bda5f..28d53efc192b 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -674,6 +674,10 @@  static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result,
 			.allowed = 3,
 			.result = SAM_STAT_CHECK_CONDITION,
 		},
+		{
+			.allowed = 1,
+			.result = DID_TIME_OUT << 16,
+		},
 		{},
 	};