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-rw-r--r--drivers/ide/ide-dma.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 85db8e85443a..e8c6e1ed497a 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -702,8 +702,22 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base)
702 mask = id->dma_mword & hwif->mwdma_mask; 702 mask = id->dma_mword & hwif->mwdma_mask;
703 break; 703 break;
704 case XFER_SW_DMA_0: 704 case XFER_SW_DMA_0:
705 if (id->field_valid & 2) 705 if (id->field_valid & 2) {
706 mask = id->dma_1word & hwif->swdma_mask; 706 mask = id->dma_1word & hwif->swdma_mask;
707 } else if (id->tDMA) {
708 /*
709 * ide_fix_driveid() doesn't convert ->tDMA to the
710 * CPU endianness so we need to do it here
711 */
712 u8 mode = le16_to_cpu(id->tDMA);
713
714 /*
715 * if the mode is valid convert it to the mask
716 * (the maximum allowed mode is XFER_SW_DMA_2)
717 */
718 if (mode <= 2)
719 mask = ((2 << mode) - 1) & hwif->swdma_mask;
720 }
707 break; 721 break;
708 default: 722 default:
709 BUG(); 723 BUG();