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| author | Hannes Reinecke <hare@suse.de> | 2016-01-22 15:42:41 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-25 11:58:53 -0800 |
| commit | 79bdf12f95610d752c7e271e41efc3d74e9e059f (patch) | |
| tree | 21f8c822171a6f1e7be7e1c28396f556911177cb | |
| parent | 14f6db5423f4ed5f16039b901bac43ca5df84b2d (diff) | |
| download | lwn-79bdf12f95610d752c7e271e41efc3d74e9e059f.tar.gz lwn-79bdf12f95610d752c7e271e41efc3d74e9e059f.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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 4b9cf93f3fb6..d233170cd439 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; |