diff options
| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-01-25 22:17:19 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-01-25 22:17:19 +0100 |
| commit | 7b905994ce0bd332afc5ebc30ce9afa60d23c6e2 (patch) | |
| tree | 4f0f25616d816087e0022dce95f996c99c8dcc6e /drivers/ide | |
| parent | 23b1bd459c9e8a925381960f0b69ac85468c3af1 (diff) | |
ide: cleanup ide_set_dma()
* ->dma_off_quietly is always called before ide_set_dma()
so the call can be moved inside ide_set_dma().
* ide_dma_check() doesn't touch hardware so ->dma_off_quietly
call for 'rc == -1' case is redundant, remove it.
* '0' and '-1' are the only values returned by ide_dma_check()
so remove dead code for other cases.
There should be no functionality 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')
| -rw-r--r-- | drivers/ide/ide-dma.c | 25 | ||||
| -rw-r--r-- | drivers/ide/ide-io.c | 1 | ||||
| -rw-r--r-- | drivers/ide/ide-probe.c | 10 | ||||
| -rw-r--r-- | drivers/ide/ide.c | 1 |
4 files changed, 12 insertions, 25 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index 7568c3e81f2..01036305d6f 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -827,22 +827,19 @@ int ide_set_dma(ide_drive_t *drive) ide_hwif_t *hwif = drive->hwif; int rc; - rc = ide_dma_check(drive); + /* + * Force DMAing for the beginning of the check. + * Some chipsets appear to do interesting + * things, if not checked and cleared. + * PARANOIA!!! + */ + hwif->dma_off_quietly(drive); - switch(rc) { - case -1: /* DMA needs to be disabled */ - hwif->dma_off_quietly(drive); - return -1; - case 0: /* DMA needs to be enabled */ - return hwif->ide_dma_on(drive); - case 1: /* DMA setting cannot be changed */ - break; - default: - BUG(); - break; - } + rc = ide_dma_check(drive); + if (rc) + return rc; - return rc; + return hwif->ide_dma_on(drive); } #ifdef CONFIG_BLK_DEV_IDEDMA_PCI diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index e053e00a705..2711b5a6962 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -221,7 +221,6 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request * */ if (drive->hwif->ide_dma_on == NULL) break; - drive->hwif->dma_off_quietly(drive); /* * TODO: respect ->using_dma setting */ diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index 33e62d28465..0379d1f697c 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -833,16 +833,8 @@ static void probe_hwif(ide_hwif_t *hwif) drive->nice1 = 1; - if (hwif->ide_dma_on) { - /* - * Force DMAing for the beginning of the check. - * Some chipsets appear to do interesting - * things, if not checked and cleared. - * PARANOIA!!! - */ - hwif->dma_off_quietly(drive); + if (hwif->ide_dma_on) ide_set_dma(drive); - } } } diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c index 00ef6ec2c27..c6d4f630e18 100644 --- a/drivers/ide/ide.c +++ b/drivers/ide/ide.c @@ -851,7 +851,6 @@ int set_using_dma(ide_drive_t *drive, int arg) err = 0; if (arg) { - hwif->dma_off_quietly(drive); if (ide_set_dma(drive)) err = -EIO; } else |