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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-31 22:15:20 +0400
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-31 22:15:20 +0400
commit5ae5412d9a23b05ab08461b202bad21ad8f6b66d (patch)
tree25d86e7cf0b57e15efa74e5150c2a654fc9339c9 /drivers/ide/ide-dma.c
parent4453011f959a5f5c6c7a33aea54fe17f5e43a867 (diff)
downloadlinux-5ae5412d9a23b05ab08461b202bad21ad8f6b66d.tar.xz
ide: add ide_dma_prepare() helper
* Add ide_dma_prepare() helper. * Convert ide_issue_pc() and do_rw_taskfile() to use it. * Make ide_build_sglist() static. 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.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index b430898bbcd6..cf5897f5533f 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -128,7 +128,7 @@ int ide_dma_good_drive(ide_drive_t *drive)
* operate in a portable fashion.
*/
-int ide_build_sglist(ide_drive_t *drive, struct ide_cmd *cmd)
+static int ide_build_sglist(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
@@ -563,3 +563,12 @@ int ide_allocate_dma_engine(ide_hwif_t *hwif)
return 0;
}
EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
+
+int ide_dma_prepare(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
+ ide_build_sglist(drive, cmd) == 0 ||
+ drive->hwif->dma_ops->dma_setup(drive, cmd))
+ return 1;
+ return 0;
+}