[SCSI] scsi: sd, sr, st, and scsi_lib all fail to copy cmd_len to new cmd

This fixes an issue in scsi command initialization from a request
where sd, sr, st, and scsi_lib all fail to copy the request's
cmd_len to the scsi command's cmd_len field.

Signed-off-by: Timothy Thelin <timothy.thelin@wdc.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/scsi_lib.c

@@ -1268,6 +1268,7 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req)
 			}
 		} else {
 			memcpy(cmd->cmnd, req->cmd, sizeof(cmd->cmnd));
+			cmd->cmd_len = req->cmd_len;
 			if (rq_data_dir(req) == WRITE)
 				cmd->sc_data_direction = DMA_TO_DEVICE;
 			else if (req->data_len)

drivers/scsi/sd.c

@@ -235,6 +235,7 @@ static int sd_init_command(struct scsi_cmnd * SCpnt)
 			return 0;
 
 		memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
+		SCpnt->cmd_len = rq->cmd_len;
 		if (rq_data_dir(rq) == WRITE)
 			SCpnt->sc_data_direction = DMA_TO_DEVICE;
 		else if (rq->data_len)

drivers/scsi/sr.c

@@ -326,6 +326,7 @@ static int sr_init_command(struct scsi_cmnd * SCpnt)
 			return 0;
 
 		memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
+		SCpnt->cmd_len = rq->cmd_len;
 		if (!rq->data_len)
 			SCpnt->sc_data_direction = DMA_NONE;
 		else if (rq_data_dir(rq) == WRITE)

drivers/scsi/st.c

@@ -4206,6 +4206,7 @@ static int st_init_command(struct scsi_cmnd *SCpnt)
 		return 0;
 
 	memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
+	SCpnt->cmd_len = rq->cmd_len;
 
 	if (rq_data_dir(rq) == WRITE)
 		SCpnt->sc_data_direction = DMA_TO_DEVICE;