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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-03-31 20:15:20 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-03-31 20:15:20 +0200 |
| commit | 5ae5412d9a23b05ab08461b202bad21ad8f6b66d (patch) | |
| tree | 25d86e7cf0b57e15efa74e5150c2a654fc9339c9 /drivers/ide/ide-dma.c | |
| parent | ide: destroy DMA mappings after ending DMA (v2) (diff) | |
| download | linux-5ae5412d9a23b05ab08461b202bad21ad8f6b66d.tar.xz linux-5ae5412d9a23b05ab08461b202bad21ad8f6b66d.zip | |
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.c | 11 |
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; +} |