diff options
Diffstat (limited to 'drivers/ide/ide-cd.c')
| -rw-r--r-- | drivers/ide/ide-cd.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c index d6667c3..e12d602 100644 --- a/drivers/ide/ide-cd.c +++ b/drivers/ide/ide-cd.c @@ -1191,12 +1191,17 @@ static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) info->dma = 0; /* sg request */ - if (rq->bio) { - int mask = drive->queue->dma_alignment; - unsigned long addr = - (unsigned long)page_address(bio_page(rq->bio)); + 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); + if (rq->bio) + addr = (unsigned long)bio_data(rq->bio); + else + addr = (unsigned long)rq->data; + info->dma = drive->using_dma; /* @@ -1205,7 +1210,8 @@ 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 & 15) || (addr & mask)) + alignment = queue_dma_alignment(q) | q->dma_pad_mask; + if (addr & alignment || rq->data_len & alignment) info->dma = 0; if (!((addr & stack_mask) ^ @@ -1877,6 +1883,7 @@ static int ide_cdrom_setup(ide_drive_t *drive) blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); blk_queue_dma_alignment(drive->queue, 31); + blk_queue_update_dma_pad(drive->queue, 15); drive->queue->unplug_delay = (1 * HZ) / 1000; if (!drive->queue->unplug_delay) drive->queue->unplug_delay = 1; |
