[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: Jens 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: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 78e3e7b..39f3e91 100644 (file)
--- a/drivers/ide/ide-cd.c
+++ b/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;
        }