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authorChauhan, Vijay <Vijay.Chauhan@lsi.com>2009-04-20 18:14:23 +0530
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-05-20 17:21:14 -0500
commit8f03226358972f93cd45be0a710927cbb7fd5127 (patch)
tree2eb0bb2f78263675469a83d8a11d85724d4961c9 /drivers/scsi
parentfa8584566cc9cdaf067dbc12132792887a521da9 (diff)
[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>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/device_handler/scsi_dh_rdac.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index 43b8c51e98d..fd0544f7da8 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -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.