[ide] __ide_do_rw_disk() lba48 dma check fix

In __ide_do_rw_disk(), the shifted block, instead of the
original rq->sector, should be used when checking range for
lba48 dma.
Signed-off-by: Tejun Heo <tj@home-tj.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-disk.c

@@ -132,7 +132,7 @@ ide_startstop_t __ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector
 	nsectors.all		= (u16) rq->nr_sectors;
 
 	if (hwif->no_lba48_dma && lba48 && dma) {
-		if (rq->sector + rq->nr_sectors > 1ULL << 28)
+		if (block + rq->nr_sectors > 1ULL << 28)
 			dma = 0;
 	}