[PATCH] powerpc: pci_address_to_pio fix
This fixes pci_address_to_pio() to return an unsigned long (to be safe)
and fixes a bug in the implementation that caused it to return a bogus
IO port number
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/ppc/kernel/pci.c b/arch/ppc/kernel/pci.c
index 8de3203..c8b48f1 100644
--- a/arch/ppc/kernel/pci.c
+++ b/arch/ppc/kernel/pci.c
@@ -1811,7 +1811,7 @@
EXPORT_SYMBOL(pci_iomap);
EXPORT_SYMBOL(pci_iounmap);
-unsigned int pci_address_to_pio(phys_addr_t address)
+unsigned long pci_address_to_pio(phys_addr_t address)
{
struct pci_controller* hose = hose_head;
@@ -1819,9 +1819,11 @@
unsigned int size = hose->io_resource.end -
hose->io_resource.start + 1;
if (address >= hose->io_base_phys &&
- address < (hose->io_base_phys + size))
- return (unsigned int)hose->io_base_virt +
- (address - hose->io_base_phys);
+ address < (hose->io_base_phys + size)) {
+ unsigned long base =
+ (unsigned long)hose->io_base_virt - _IO_BASE;
+ return base + (address - hose->io_base_phys);
+
}
return (unsigned int)-1;
}