From: Sergei Shtylyov Date: Mon, 7 Apr 2008 21:30:10 +0000 (+0200) Subject: siimage: fix kernel oops on PPC 44x X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c976816b6e901341ec3c4653147316c15549a1c4;p=openwrt%2Fstaging%2Fblogic.git siimage: fix kernel oops on PPC 44x Fix kernel oops due to machine check occuring in init_chipset_siimage() on PPC 44x platforms. These 32-bit CPUs have 36-bit physical address and PCI I/O and memory spaces are mapped beyond 4 GB; arch/ppc/ code has a fixup in ioremap() that creates an illusion of the PCI I/O and memory resources being mapped below 4 GB, while arch/powerpc/ code got rid of this fixup with PPC 44x having instead CONFIG_RESOURCES_64BIT=y -- this causes the resources to be truncated to 32-bit 'unsigned long' type in this driver, and so non-existant memory being ioremap'ed and then accessed... Thanks to Valentine Barshak for providing an initial patch and explanations. Signed-off-by: Sergei Shtylyov Signed-off-by: Bartlomiej Zolnierkiewicz --- diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c index cc4be9621bc0..8d624afe8529 100644 --- a/drivers/ide/pci/siimage.c +++ b/drivers/ide/pci/siimage.c @@ -492,7 +492,7 @@ static void proc_reports_siimage (struct pci_dev *dev, u8 clocking, const char * static unsigned int setup_mmio_siimage (struct pci_dev *dev, const char *name) { - unsigned long bar5 = pci_resource_start(dev, 5); + resource_size_t bar5 = pci_resource_start(dev, 5); unsigned long barsize = pci_resource_len(dev, 5); u8 tmpbyte = 0; void __iomem *ioaddr;