ide: add ide_set_dma() helper (v2)
* 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>
diff --git a/drivers/ide/pci/it8213.c b/drivers/ide/pci/it8213.c
index 63248b6..424f00b 100644
--- a/drivers/ide/pci/it8213.c
+++ b/drivers/ide/pci/it8213.c
@@ -244,17 +244,15 @@
static int it8213_config_drive_for_dma (ide_drive_t *drive)
{
- ide_hwif_t *hwif = drive->hwif;
+ u8 pio;
- if (ide_use_dma(drive)) {
- if (config_chipset_for_dma(drive))
- return hwif->ide_dma_on(drive);
- }
+ if (ide_use_dma(drive) && config_chipset_for_dma(drive))
+ return 0;
- hwif->speedproc(drive, XFER_PIO_0
- + ide_get_best_pio_mode(drive, 255, 4, NULL));
+ pio = ide_get_best_pio_mode(drive, 255, 4, NULL);
+ it8213_tune_chipset(drive, XFER_PIO_0 + pio);
- return hwif->ide_dma_off_quietly(drive);
+ return -1;
}
/**