[SCSI] scsi_dh_emc: fix mode select request setup

This patch fixes the request setup code for mode selects. I got the fixes from
Hannes Reinecke while trying to hunt down some problems and merged it
into one patch. I am sending it because Hannes is busy with other things.

The patch fixes:
- setting of the length for mode selects.
- setting of the data direction for mode select 10.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
index 61966750bd60..63032ec3db92 100644
--- a/drivers/scsi/device_handler/scsi_dh_emc.c
+++ b/drivers/scsi/device_handler/scsi_dh_emc.c
@@ -272,7 +272,7 @@ static struct request *get_req(struct scsi_device *sdev, int cmd,
         int len = 0;
 
         rq = blk_get_request(sdev->request_queue,
-                        (cmd == MODE_SELECT) ? WRITE : READ, GFP_NOIO);
+                        (cmd != INQUIRY) ? WRITE : READ, GFP_NOIO);
         if (!rq) {
                 sdev_printk(KERN_INFO, sdev, "get_req: blk_get_request failed");
                 return NULL;
@@ -286,14 +286,17 @@ static struct request *get_req(struct scsi_device *sdev, int cmd,
                 len = sizeof(short_trespass);
                 rq->cmd_flags |= REQ_RW;
                 rq->cmd[1] = 0x10;
+                rq->cmd[4] = len;
                 break;
         case MODE_SELECT_10:
                 len = sizeof(long_trespass);
                 rq->cmd_flags |= REQ_RW;
                 rq->cmd[1] = 0x10;
+                rq->cmd[8] = len;
                 break;
         case INQUIRY:
                 len = CLARIION_BUFFER_SIZE;
+                rq->cmd[4] = len;
                 memset(buffer, 0, len);
                 break;
         default:
@@ -301,7 +304,6 @@ static struct request *get_req(struct scsi_device *sdev, int cmd,
                 break;
         }
 
-        rq->cmd[4] = len;
         rq->cmd_type = REQ_TYPE_BLOCK_PC;
         rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT |
                          REQ_FAILFAST_DRIVER;