src/patches/suse-2.6.27.31/patches.fixes/scsi-dh-rdac-retry-for-not-ready

   1 From: Vijay Chauhan <vijay.chauhan@lsi.com>
   2 Subject: Retry NOT READY for rdac device handler
   3 References: bnc#496502
   4
   5 During device discovery read capacity fails with 0x020401 and sets the device
   6 size to 0. As a reason any I/O submitted to this path gets killed at sd_prep_fn
   7 with BLKPREP_KILL. This patch is to retry for 0x020401. NEED_RETRY in
   8 scsi_decide_disposition does not give sufficient time for the device to become
   9 ready.
  10
  11 Signed-off-by: Vijay Chauhan <vijay.chauhan@lsi.com>
  12 Signed-off-by: Hannes Reinecke <hare@suse.de>
  13
  14 diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
  15 index 77b724f..4c97279 100644
  16 --- a/drivers/scsi/device_handler/scsi_dh_rdac.c
  17 +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
  18 @@ -548,6 +548,11 @@ static int rdac_check_sense(struct scsi_device *sdev,
  19         struct rdac_dh_data *h = get_rdac_data(sdev);
  20         switch (sense_hdr->sense_key) {
  21         case NOT_READY:
  22 +               if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x01)
  23 +                       /* LUN Not Ready - In process of becoming ready
  24 +                        * Just retry.
  25 +                        */
  26 +                       return ADD_TO_MLQUEUE;
  27                 if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x81)
  28                         /* LUN Not Ready - Storage firmware incompatible
  29                          * Manual code synchonisation required.