From 3649c06e66ad3589374e8765ed69eda65658735c Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Wed, 16 May 2007 00:51:46 +0200 Subject: 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 --- drivers/ide/ide-dma.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers') 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(); -- cgit v1.2.3