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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-31 22:15:21 +0400
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-31 22:15:21 +0400
commit8a4a5738ba499083cf4c5668895efe220b1946d3 (patch)
tree78272b711b31f43526d2c665478cc3bdb0b6e393 /drivers/ide/ide-dma.c
parent7526efaafdc835b8d6b22aa1a302e14651373908 (diff)
downloadlinux-8a4a5738ba499083cf4c5668895efe220b1946d3.tar.xz
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>
Diffstat (limited to 'drivers/ide/ide-dma.c')
-rw-r--r--drivers/ide/ide-dma.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index cf5897f5533f..c0505e2dfc2e 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -566,9 +566,12 @@ EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
int ide_dma_prepare(ide_drive_t *drive, struct ide_cmd *cmd)
{
+ const struct ide_dma_ops *dma_ops = drive->hwif->dma_ops;
+
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
+ (dma_ops->dma_check && dma_ops->dma_check(drive, cmd)) ||
ide_build_sglist(drive, cmd) == 0 ||
- drive->hwif->dma_ops->dma_setup(drive, cmd))
+ dma_ops->dma_setup(drive, cmd))
return 1;
return 0;
}