src/patches/suse-2.6.27.31/patches.fixes/scsi-dh-emc-mode-select-10-size

   1 From: Hannes Reinecke <hare@suse.de>
   2 Subject: DM-MPIO fails to tresspass LUNs on CLARiiON arrays
   3 References: bnc#484529
   4
   5 When failing active paths on Clariion arrays, the trespass
   6 command is sent but not process correctly. Reason is that
   7 we're not formatting the command correctly, and the array
   8 just silently ignores the error.
   9
  10 Signed-off-by: Hannes Reinecke <hare@suse.de>
  11
  12 diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
  13 index 2505237..822680e 100644
  14 --- a/drivers/scsi/device_handler/scsi_dh_emc.c
  15 +++ b/drivers/scsi/device_handler/scsi_dh_emc.c
  16 @@ -286,14 +286,17 @@ static struct request *get_req(struct scsi_device *sdev, int cmd,
  17                 len = sizeof(short_trespass);
  18                 rq->cmd_flags |= REQ_RW;
  19                 rq->cmd[1] = 0x10;
  20 +               rq->cmd[4] = len;
  21                 break;
  22         case MODE_SELECT_10:
  23                 len = sizeof(long_trespass);
  24                 rq->cmd_flags |= REQ_RW;
  25                 rq->cmd[1] = 0x10;
  26 +               rq->cmd[8] = len;
  27                 break;
  28         case INQUIRY:
  29                 len = CLARIION_BUFFER_SIZE;
  30 +               rq->cmd[4] = len;
  31                 memset(buffer, 0, len);
  32                 break;
  33         default:
  34 @@ -301,7 +304,6 @@ static struct request *get_req(struct scsi_device *sdev, int cmd,
  35                 break;
  36         }
  37
  38 -       rq->cmd[4] = len;
  39         rq->cmd_type = REQ_TYPE_BLOCK_PC;
  40         rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT |
  41                          REQ_FAILFAST_DRIVER;