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 <sshtylyov@xxxxxxxxxxxxx>
drivers/ide/pci/siimage.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6/drivers/ide/pci/siimage.c
===================================================================
--- linux-2.6.orig/drivers/ide/pci/siimage.c
+++ linux-2.6/drivers/ide/pci/siimage.c
@@ -492,7 +492,7 @@ static void proc_reports_siimage (struct
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;
--
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