diff options
| -rw-r--r-- | drivers/ide/ide-cd.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c index 239557f8920e..accb53b85ba7 100644 --- a/drivers/ide/ide-cd.c +++ b/drivers/ide/ide-cd.c @@ -1164,13 +1164,12 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { struct request_queue *q = drive->queue; unsigned int alignment; - unsigned long addr; - unsigned long stack_mask = ~(THREAD_SIZE - 1); + char *buf; if (rq->bio) - addr = (unsigned long)bio_data(rq->bio); + buf = bio_data(rq->bio); else - addr = (unsigned long)rq->data; + buf = rq->data; info->dma = drive->using_dma; @@ -1181,11 +1180,8 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) * separate masks. */ alignment = queue_dma_alignment(q) | q->dma_pad_mask; - if (addr & alignment || rq->data_len & alignment) - info->dma = 0; - - if (!((addr & stack_mask) ^ - ((unsigned long)current->stack & stack_mask))) + if ((unsigned long)buf & alignment || rq->data_len & alignment + || object_is_on_stack(buf)) info->dma = 0; } } |