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/sgiioc4.c b/drivers/ide/pci/sgiioc4.c
index 290697e..cb5c321 100644
--- a/drivers/ide/pci/sgiioc4.c
+++ b/drivers/ide/pci/sgiioc4.c
@@ -296,9 +296,9 @@
if (ide_config_drive_speed(drive, XFER_MW_DMA_2) != 0) {
printk(KERN_WARNING "%s: couldn't set MWDMA2 mode, "
"using PIO instead\n", drive->name);
- return sgiioc4_ide_dma_off_quietly(drive);
+ return -1;
} else
- return sgiioc4_ide_dma_on(drive);
+ return 0;
}
/* returns 1 if dma irq issued, 0 otherwise */