[PATCH] Relax idecd dma alignment check

Only the address needs alignment of mask bits, length should work with
a relaxed alignment check.
Signed-off-by: NJens Axboe <axboe@suse.de>

[ This is take 2: make the length check be for 16-byte alignment, not
  just word alignment.  That should hopefully keep everybody happy,
  while still allowing CD writing with DMA ]
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/ide/ide-cd.c

@@ -1936,7 +1936,7 @@ static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 		 * NOTE! The "len" and "addr" checks should possibly have
 		 * separate masks.
 		 */
-		if ((rq->data_len & mask) || (addr & mask))
+		if ((rq->data_len & 15) || (addr & mask))
 			info->dma = 0;
 	}