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[SCSI] scsi_dh_rdac: Retry for NOT_READY(02/04/01) in rdac device handler 

During device discovery read capacity fails with 0x020401 and sets the
device size to 0. As a reason any I/O submitted to this path gets
killed at sd_prep_fn with BLKPREP_KILL. This patch is to retry for
0x020401. NEED_RETRY in scsi_decide_disposition does not give
sufficient time for the device to become ready.

Signed-off-by: Vijay Chauhan <vijay.chauhan@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Chauhan, Vijay 2009-04-20 18:14:23 +05:30 committed by James Bottomley
parent fa8584566c
commit 8f03226358
1 changed files with 6 additions and 0 deletions
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6
drivers/scsi/device_handler/scsi_dh_rdac.c
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@ -561,6 +561,12 @@ static int rdac_check_sense(struct scsi_device *sdev,
struct rdac_dh_data *h = get_rdac_data(sdev);
switch (sense_hdr->sense_key) {
case NOT_READY:
if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x01)
/* LUN Not Ready - Logical Unit Not Ready and is in
* the process of becoming ready
* Just retry.
*/
return ADD_TO_MLQUEUE;
if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x81)
/* LUN Not Ready - Storage firmware incompatible
* Manual code synchonisation required.