[SCSI] scsi dh alua: fix group id masking

The buf[i] is a byte but we are only asking 4 bits off the
group_id. This patch has us take off a byte.
Signed-off-by: NIlgu Hong <ilgu.hong@promise.com>
Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/device_handler/scsi_dh_alua.c

@@ -247,8 +247,8 @@ static unsigned submit_stpg(struct scsi_device *sdev, struct alua_dh_data *h)
 	/* Prepare the data buffer */
 	memset(h->buff, 0, stpg_len);
 	h->buff[4] = TPGS_STATE_OPTIMIZED & 0x0f;
-	h->buff[6] = (h->group_id >> 8) & 0x0f;
-	h->buff[7] = h->group_id & 0x0f;
+	h->buff[6] = (h->group_id >> 8) & 0xff;
+	h->buff[7] = h->group_id & 0xff;
 
 	rq = get_alua_req(sdev, h->buff, stpg_len, WRITE);
 	if (!rq)