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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>
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1 changed files with 4 additions and 2 deletions
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@ -731,10 +731,12 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base)
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mask &= 0x07;
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break;
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case XFER_MW_DMA_0:
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mask = id->dma_mword & hwif->mwdma_mask;
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if (id->field_valid & 2)
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mask = id->dma_mword & hwif->mwdma_mask;
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break;
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case XFER_SW_DMA_0:
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mask = id->dma_1word & hwif->swdma_mask;
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if (id->field_valid & 2)
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mask = id->dma_1word & hwif->swdma_mask;
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break;
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default:
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BUG();
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