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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-07-10 01:17:57 +0400 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-07-10 01:17:57 +0400 |
| commit | 15a4f943e729d8ba215ee551df6d7988ba14ac00 (patch) | |
| tree | 16c115fc64919b905f928066d354a4008b231356 /drivers/ide | |
| parent | ecea57309e826c8aed020e4dae92b368f2eda2a5 (diff) | |
| download | linux-15a4f943e729d8ba215ee551df6d7988ba14ac00.tar.xz | |
ide: fix pre-EIDE SWDMA support
If the word 62 is not defined use the word 52 to get SWDMA mask
in ide_get_mode_mask().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide')
| -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 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) 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(); |