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ide: add missing validity checks for identify words 62 and 63

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Check validity of identify words 62 and 63 before using them in
ide_get_mode_mask().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-05-16 00:51:46 +02:00
parent 4728d546d7
commit 3649c06e66
1 changed files with 4 additions and 2 deletions
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6
drivers/ide/ide-dma.c
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@ -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();