* ->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.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/ide-dma.c | 25 +++++++++++--------------
drivers/ide/ide-io.c | 1 -
drivers/ide/ide-probe.c | 10 +---------
drivers/ide/ide.c | 1 -
4 files changed, 12 insertions(+), 25 deletions(-)
Index: b/drivers/ide/ide-dma.c
===================================================================
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -862,22 +862,19 @@ 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
Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -221,7 +221,6 @@ static ide_startstop_t ide_start_power_s
*/
if (drive->hwif->ide_dma_on == NULL)
break;
- drive->hwif->dma_off_quietly(drive);
/*
* TODO: respect ->using_dma setting
*/
Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -840,16 +840,8 @@ 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);
- }
}
}
Index: b/drivers/ide/ide.c
===================================================================
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -845,7 +845,6 @@ int set_using_dma(ide_drive_t *drive, in
err = 0;
if (arg) {
- hwif->dma_off_quietly(drive);
if (ide_set_dma(drive))
err = -EIO;
} else
-
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