[PATCH] increase PCIBIOS_MIN_IO on x86

There is a number of x86 laptops that have some non-PCI IO ports
in the 0x1000-0x1fff range, and it's quite hard to control the correct
order of resource allocation between PCI and other subsystems controlling
these ports. Especially with modular kernel.

So just increase PCIBIOS_MIN_IO to 0x4000 to prevent any new PCI
resource allocations in the problematic range (this limitation must
apply _only_ to the root bus resources - see Linus' change in
pci_bus_alloc_resource).  As PCIBIOS_MIN_IO and PCIBIOS_MIN_CARDBUS_IO
are the same now on i386 and x86-64, we can remove the latter.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 3 deletions

diff --git a/include/asm-i386/pci.h b/include/asm-i386/pci.h
index 78c85985aee3..2cbab30734d6 100644
--- a/include/asm-i386/pci.h
+++ b/include/asm-i386/pci.h
@@ -18,11 +18,9 @@ extern unsigned int pcibios_assign_all_busses(void);
 #define pcibios_scan_all_fns(a, b)      0
 
 extern unsigned long pci_mem_start;
-#define PCIBIOS_MIN_IO          0x1000
+#define PCIBIOS_MIN_IO          0x4000
 #define PCIBIOS_MIN_MEM         (pci_mem_start)
 
-#define PCIBIOS_MIN_CARDBUS_IO  0x4000
-
 void pcibios_config_init(void);
 struct pci_bus * pcibios_scan_root(int bus);