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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/sc1200.c
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@@ -241,10 +241,7 @@ static int sc1200_config_dma2 (ide_drive_t *drive, int mode)
outb(inb(hwif->dma_base+2)|(unit?0x40:0x20), hwif->dma_base+2); /* set DMA_capable bit */
/*
* Finally, turn DMA on in software, and exit.
*/
return hwif->ide_dma_on(drive); /* success */
return 0; /* success */
}
/*