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/serverworks.c b/drivers/ide/pci/serverworks.c
index f44a5ab..dbcd37a 100644
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -315,17 +315,15 @@
static int svwks_config_drive_xfer_rate (ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
-
drive->init_speed = 0;
if (ide_use_dma(drive) && config_chipset_for_dma(drive))
- return hwif->ide_dma_on(drive);
+ return 0;
if (ide_use_fast_pio(drive))
config_chipset_for_pio(drive);
- return hwif->ide_dma_off_quietly(drive);
+ return -1;
}
static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const char *name)