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/ppc/scc_pata.c b/drivers/ide/ppc/scc_pata.c
index 7e3e93c..de64b02 100644
--- a/drivers/ide/ppc/scc_pata.c
+++ b/drivers/ide/ppc/scc_pata.c
@@ -371,15 +371,13 @@
static int scc_config_drive_for_dma(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
-
if (ide_use_dma(drive) && scc_config_chipset_for_dma(drive))
- return hwif->ide_dma_on(drive);
+ return 0;
if (ide_use_fast_pio(drive))
- hwif->tuneproc(drive, 4);
+ scc_tuneproc(drive, 4);
- return hwif->ide_dma_off_quietly(drive);
+ return -1;
}
/**