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-rw-r--r--drivers/ide/ide-dma.c25
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 7568c3e..0103630 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
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