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| author | Hannes Reinecke <hare@suse.de> | 2016-01-22 15:42:41 +0100 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2016-02-24 10:23:28 +0100 |
| commit | 6c3964e45284838e2bc550d13484cc669510e6b4 (patch) | |
| tree | 1cfd8097b9e1602c3aa6eea92ecb8ac328deaa82 | |
| parent | 26d026b8d14d7d4f01fe59ab97b0c7c2c40d3ec7 (diff) | |
| download | lwn-6c3964e45284838e2bc550d13484cc669510e6b4.tar.gz lwn-6c3964e45284838e2bc550d13484cc669510e6b4.zip | |
scsi_dh_rdac: always retry MODE SELECT on command lock violation
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: Jiri Slaby <jslaby@suse.cz>
| -rw-r--r-- | drivers/scsi/device_handler/scsi_dh_rdac.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c index 69c915aa77c2..d661fcda1932 100644 --- a/drivers/scsi/device_handler/scsi_dh_rdac.c +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c @@ -569,7 +569,7 @@ 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; @@ -619,6 +619,8 @@ 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; |