ub: fix up the conversion to sg_init_table()

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Cc: "Oliver Pinter" <oliver.pntr@gmail.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/block/ub.c

@@ -657,7 +657,6 @@ static int ub_request_fn_1(struct ub_lun *lun, struct request *rq)
 	if ((cmd = ub_get_cmd(lun)) == NULL)
 		return -1;
 	memset(cmd, 0, sizeof(struct ub_scsi_cmd));
-	sg_init_table(cmd->sgv, UB_MAX_REQ_SG);
 
 	blkdev_dequeue_request(rq);
 
@@ -668,6 +667,7 @@ static int ub_request_fn_1(struct ub_lun *lun, struct request *rq)
 	/*
 	 * get scatterlist from block layer
 	 */
+	sg_init_table(&urq->sgv[0], UB_MAX_REQ_SG);
 	n_elem = blk_rq_map_sg(lun->disk->queue, rq, &urq->sgv[0]);
 	if (n_elem < 0) {
 		/* Impossible, because blk_rq_map_sg should not hit ENOMEM. */