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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-05-16 00:51:46 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-05-16 00:51:46 +0200 |
| commit | 3649c06e66ad3589374e8765ed69eda65658735c (patch) | |
| tree | f1ab3e892a8c6719f5d986185b86046c2e2a25c5 /drivers/ide/ide-dma.c | |
| parent | 4728d546d7137ad5350cc2e53d4748fd26f61a60 (diff) | |
| download | linux-3649c06e66ad3589374e8765ed69eda65658735c.tar.gz linux-3649c06e66ad3589374e8765ed69eda65658735c.tar.bz2 linux-3649c06e66ad3589374e8765ed69eda65658735c.zip | |
ide: add missing validity checks for identify words 62 and 63
Check validity of identify words 62 and 63 before using them in
ide_get_mode_mask().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-dma.c')
| -rw-r--r-- | drivers/ide/ide-dma.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index de33e6f88f17..ada2a3ea9430 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -731,10 +731,12 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base) mask &= 0x07; break; case XFER_MW_DMA_0: - mask = id->dma_mword & hwif->mwdma_mask; + if (id->field_valid & 2) + mask = id->dma_mword & hwif->mwdma_mask; break; case XFER_SW_DMA_0: - mask = id->dma_1word & hwif->swdma_mask; + if (id->field_valid & 2) + mask = id->dma_1word & hwif->swdma_mask; break; default: BUG(); |