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 <[EMAIL PROTECTED]> --- drivers/ide/pci/cs5530.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) Index: b/drivers/ide/pci/cs5530.c =================================================================== --- a/drivers/ide/pci/cs5530.c +++ b/drivers/ide/pci/cs5530.c @@ -1,5 +1,5 @@ /* - * linux/drivers/ide/pci/cs5530.c Version 0.73 Mar 10 2007 + * linux/drivers/ide/pci/cs5530.c Version 0.74 Jul 28 2007 * * Copyright (C) 2000 Andre Hedrick <[EMAIL PROTECTED]> * Copyright (C) 2000 Mark Lord <[EMAIL PROTECTED]> @@ -164,6 +164,9 @@ static unsigned int __devinit init_chips struct pci_dev *master_0 = NULL, *cs5530_0 = NULL; unsigned long flags; + if (pci_resource_start(dev, 4) == 0) + return -EFAULT; + dev = NULL; while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) { switch (dev->device) { @@ -282,6 +285,9 @@ static void __devinit init_hwif_cs5530 ( /* needs autotuning later */ } + if (hwif->dma_base == 0) + return; + hwif->atapi_dma = 1; hwif->ultra_mask = 0x07; hwif->mwdma_mask = 0x07; - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html