Messages in this thread Patch in this message | | | Date | Fri, 04 Mar 2016 16:30:23 +0100 | From | Willy Tarreau <> | Subject | [PATCH 2.6.32 23/55] scsi_dh_rdac: always retry MODE SELECT on command lock violation |
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2.6.32-longterm review patch. If anyone has any objections, please let me know.
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From: Hannes Reinecke <hare@suse.de>
commit d2d06d4fe0f2cc2df9b17fefec96e6e1a1271d91 upstream.
If MODE SELECT returns with sense '05/91/36' (command lock violation) it should always be retried without counting the number of retries. During an HBA upgrade or similar circumstances one might see a flood of MODE SELECT command from various HBAs, which will easily trigger the sense code and exceed the retry count.
Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Willy Tarreau <w@1wt.eu> --- drivers/scsi/device_handler/scsi_dh_rdac.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c index 268189d..ec985bc 100644 --- a/drivers/scsi/device_handler/scsi_dh_rdac.c +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c @@ -518,7 +518,7 @@ static int mode_select_handle_sense(struct scsi_device *sdev, /* * Command Lock contention */ - err = SCSI_DH_RETRY; + err = SCSI_DH_IMM_RETRY; break; default: break; @@ -556,6 +556,8 @@ retry: err = mode_select_handle_sense(sdev, h->sense); if (err == SCSI_DH_RETRY && retry_cnt--) goto retry; + if (err == SCSI_DH_IMM_RETRY) + goto retry; } if (err == SCSI_DH_OK) { h->state = RDAC_STATE_ACTIVE; -- 1.7.12.2.21.g234cd45.dirty
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