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ide: add ide_set_dma() helper (v2)

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* add ide_set_dma() helper and make ide_hwif_t.ide_dma_check return
  -1 when DMA needs to be disabled (== need to call ->ide_dma_off_quietly)
   0 when DMA needs to be enabled  (== need to call ->ide_dma_on)
   1 when DMA setting shouldn't be changed
* fix IDE code to use ide_set_dma() instead if using ->ide_dma_check directly

v2:
* updated for scc_pata

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2007-02-17 02:40:26 +01:00
parent 9ef5791e1b
commit 3608b5d71a
36 changed files with 120 additions and 139 deletions
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5
drivers/ide/pci/cs5535.c
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@@ -195,20 +195,19 @@ static int cs5535_config_drive_for_dma(ide_drive_t *drive)
static int cs5535_dma_check(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 speed;
drive->init_speed = 0;
if (ide_use_dma(drive) && cs5535_config_drive_for_dma(drive))
return hwif->ide_dma_on(drive);
return 0;
if (ide_use_fast_pio(drive)) {
speed = ide_get_best_pio_mode(drive, 255, 4, NULL);
cs5535_set_drive(drive, speed);
}
return hwif->ide_dma_off_quietly(drive);
return -1;
}
static u8 __devinit cs5535_cable_detect(struct pci_dev *dev)