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pdc202xx_new: add missing ->dma_base check 

If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks
shouldn't be initialized or bad things will happen.

Also this host driver requires valid PCI BAR4 for normal operation so
check it in ->init_chipset and fail initialization if not set.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-08-20 22:42:56 +02:00
parent f7b0d2df2f
commit 01cc643ae3
1 changed files with 8 additions and 2 deletions
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10
drivers/ide/pci/pdc202xx_new.c
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@ -378,6 +378,9 @@ static unsigned int __devinit init_chipset_pdcnew(struct pci_dev *dev, const cha
int f, r;
u8 pll_ctl0, pll_ctl1;
if (dma_base == 0)
return -EFAULT;
#ifdef CONFIG_PPC_PMAC
apple_kiwi_init(dev);
#endif
@ -494,15 +497,18 @@ static void __devinit init_hwif_pdc202new(ide_hwif_t *hwif)
hwif->speedproc = &pdcnew_tune_chipset;
hwif->resetproc = &pdcnew_reset;
hwif->err_stops_fifo = 1;
hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
if (hwif->dma_base == 0)
return;
hwif->atapi_dma = 1;
hwif->ultra_mask = hwif->cds->udma_mask;
hwif->mwdma_mask = 0x07;
hwif->err_stops_fifo = 1;
hwif->ide_dma_check = &pdcnew_config_drive_xfer_rate;
if (hwif->cbl != ATA_CBL_PATA40_SHORT)