ide: add ide_tune_dma() helper
After reworking the code responsible for selecting the best DMA
transfer mode it is now possible to add generic ide_tune_dma() helper.
Convert some IDE PCI host drivers to use it (the ones left need more work).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index f28fabb..5fe8519 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -779,6 +779,26 @@
EXPORT_SYMBOL_GPL(ide_max_dma_mode);
+int ide_tune_dma(ide_drive_t *drive)
+{
+ u8 speed;
+
+ /* TODO: use only ide_max_dma_mode() */
+ if (!ide_use_dma(drive))
+ return 0;
+
+ speed = ide_max_dma_mode(drive);
+
+ if (!speed)
+ return 0;
+
+ drive->hwif->speedproc(drive, speed);
+
+ return ide_dma_enable(drive);
+}
+
+EXPORT_SYMBOL_GPL(ide_tune_dma);
+
void ide_dma_verbose(ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;