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 <hare@xxxxxxx> --- drivers/scsi/sd.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 79beebf..7178b05 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1987,6 +1987,11 @@ 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--; @@ -2069,6 +2074,11 @@ 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--; -- 1.8.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
