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sc1200: fix ->dma_base equal zero handling

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Set hwif->atapi_dma/{ultra,mwdma}_mask and drive->autodma after checking that
->dma_base exists.  If ->dma_base is not set (== PCI BAR4 cannot be reserved)
then DMA hooks shouldn't be initialized or bad things will happen.

OTOH hwif->set_{pio,dma}_mode hooks should be set even if hwif->dma_base == 0.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-10-13 17:47:53 +02:00
parent dfb2311226
commit 88ae4d8c38
1 changed files with 13 additions and 9 deletions
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22
drivers/ide/pci/sc1200.c
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@ -378,16 +378,20 @@ static void __devinit init_hwif_sc1200 (ide_hwif_t *hwif)
if (hwif->mate)
hwif->serialized = hwif->mate->serialized = 1;
hwif->autodma = 0;
if (hwif->dma_base) {
hwif->udma_filter = sc1200_udma_filter;
hwif->ide_dma_check = &sc1200_config_dma;
hwif->ide_dma_end = &sc1200_ide_dma_end;
if (!noautodma)
hwif->autodma = 1;
hwif->set_pio_mode = &sc1200_set_pio_mode;
hwif->set_dma_mode = &sc1200_set_dma_mode;
}
hwif->set_pio_mode = &sc1200_set_pio_mode;
hwif->set_dma_mode = &sc1200_set_dma_mode;
if (hwif->dma_base == 0)
return;
hwif->udma_filter = sc1200_udma_filter;
hwif->ide_dma_check = &sc1200_config_dma;
hwif->ide_dma_end = &sc1200_ide_dma_end;
if (!noautodma)
hwif->autodma = 1;
hwif->atapi_dma = 1;
hwif->ultra_mask = 0x07;
hwif->mwdma_mask = 0x07;