ide-cd: revert DMA mask test change

The change to require the DMA length to be only word-aligned was not
safe.

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index f0bd242e030f..78e3e7b24d7d 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1932,8 +1932,11 @@ static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 
                 /*
                  * check if dma is safe
+                 *
+                 * NOTE! The "len" and "addr" checks should possibly have
+                 * separate masks.
                  */
-                if ((rq->data_len & 3) || (addr & mask))
+                if ((rq->data_len & mask) || (addr & mask))
                         info->dma = 0;
         }