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ide: use the dma safe check for REQ_TYPE_ATA_PC

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This uses the dma safe check for REQ_TYPE_ATA_PC. The dma safe check
is used for only sg requests but it should be used for other non fs
commands.

This uses blk_queue_update_dma_pad to make the intention clear though
ide don't use the blk APIs so it doesn't change anything.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Borislav Petkov <petkovbb@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
FUJITA Tomonori 2008-07-16 20:33:35 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 0b6abc1770
commit e5318b531b
1 changed files with 12 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
drivers/ide/ide-cd.c
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@ -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;