--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -767,7 +767,7 @@ int ide_set_dma(ide_drive_t *drive)
        switch(rc) {
        case -1: /* DMA needs to be disabled */
                hwif->dma_off_quietly(drive);
-               return -1;
+               return 0;
        case  0: /* DMA needs to be enabled */
                return hwif->ide_dma_on(drive);
        case  1: /* DMA setting cannot be changed */