ide: add ->dma_check method
* Add (an optional) ->dma_check method for checking if DMA can be
used for a given command and fail DMA setup in ide_dma_prepare()
if necessary.
* Convert alim15x3 and trm290 host drivers to use ->dma_check.
* Rename ali15x3_dma_setup() to ali_dma_check() while at it.
There should be no functional changes caused by this patch.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 78892e2a..b350667 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -717,6 +717,7 @@
int (*dma_test_irq)(struct ide_drive_s *);
void (*dma_lost_irq)(struct ide_drive_s *);
/* below ones are optional */
+ int (*dma_check)(struct ide_drive_s *, struct ide_cmd *);
int (*dma_timer_expiry)(struct ide_drive_s *);
void (*dma_clear)(struct ide_drive_s *);
/*