diff options
| -rw-r--r-- | drivers/ide/ide-dma.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index 85db8e85443..e8c6e1ed497 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) mask = id->dma_mword & hwif->mwdma_mask; break; case XFER_SW_DMA_0: - if (id->field_valid & 2) + if (id->field_valid & 2) { mask = id->dma_1word & hwif->swdma_mask; + } else if (id->tDMA) { + /* + * ide_fix_driveid() doesn't convert ->tDMA to the + * CPU endianness so we need to do it here + */ + u8 mode = le16_to_cpu(id->tDMA); + + /* + * if the mode is valid convert it to the mask + * (the maximum allowed mode is XFER_SW_DMA_2) + */ + if (mode <= 2) + mask = ((2 << mode) - 1) & hwif->swdma_mask; + } break; default: BUG(); |