During ALUA state transitions the device might return
a sense code 02/04/0a (Logical unit not accessible, asymmetric
access state transition). As this is a transient error
we should just retry the READ CAPACITY call until
the state transition finishes and the correct
capacity can be returned.
Signed-off-by: Hannes Reinecke <h...@suse.de>
---
drivers/scsi/sd.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 37daf9a..b4647f5 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2333,6 +2333,11 @@ static int read_capacity_16(struct scsi_disk *sdkp,
struct scsi_device *sdp,
* give it one more chance */
if (--reset_retries > 0)
continue;
+ if (sense_valid &&
+ sshdr.sense_key == NOT_READY &&
+ sshdr.asc == 0x04 && sshdr.ascq == 0x0A)
+ /* ALUA state transition; always retry */
+ continue;
}
retries--;
@@ -2418,6 +2423,11 @@ static int read_capacity_10(struct scsi_disk *sdkp,
struct scsi_device *sdp,
* give it one more chance */
if (--reset_retries > 0)
continue;
+ if (sense_valid &&
+ sshdr.sense_key == NOT_READY &&
+ sshdr.asc == 0x04 && sshdr.ascq == 0x0A)
+ /* ALUA state transition; always retry */
+ continue;
}
retries--;
--
1.8.5.6
