diff options
Diffstat (limited to 'drivers/ide/ide-dma.c')
| -rw-r--r-- | drivers/ide/ide-dma.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index 7568c3e81f2..01036305d6f 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -827,22 +827,19 @@ int ide_set_dma(ide_drive_t *drive) ide_hwif_t *hwif = drive->hwif; int rc; - rc = ide_dma_check(drive); + /* + * Force DMAing for the beginning of the check. + * Some chipsets appear to do interesting + * things, if not checked and cleared. + * PARANOIA!!! + */ + hwif->dma_off_quietly(drive); - switch(rc) { - case -1: /* DMA needs to be disabled */ - hwif->dma_off_quietly(drive); - return -1; - case 0: /* DMA needs to be enabled */ - return hwif->ide_dma_on(drive); - case 1: /* DMA setting cannot be changed */ - break; - default: - BUG(); - break; - } + rc = ide_dma_check(drive); + if (rc) + return rc; - return rc; + return hwif->ide_dma_on(drive); } #ifdef CONFIG_BLK_DEV_IDEDMA_PCI |