[PATCH] ARM: 2659/1: do not assign PCI I/O address zero on IXP2000

Patch from Lennert Buytenhek

Assigning the address zero to a PCI device BAR causes some part of the
PCI subsystem to believe that resource allocation for that BAR failed
due to resource conflicts, which will make attempts to enable the
device fail.  Work around this by assigning I/O addresses starting
from 00010000.
While we're at it, make the PCI I/O resource end at 0001ffff, since we
only have 64k of outbound I/O window on the IXP2000, and we don't do
bank switching.

Signed-off-by: Lennert Buytenhek
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-ixp2000/pci.c b/arch/arm/mach-ixp2000/pci.c
index 3844d5c7cf86cd766d9bb27733f47de36f3878b2..5ff2f2718c58c0762cfca0f3173cc74f80f09794 100644 (file)
--- a/arch/arm/mach-ixp2000/pci.c
+++ b/arch/arm/mach-ixp2000/pci.c
@@ -215,8 +215,8 @@ static struct resource ixp2000_pci_mem_space = {
 };
 
 static struct resource ixp2000_pci_io_space = {
-       .start  = 0x00000000,
-       .end    = 0xffffffff,
+       .start  = 0x00010000,
+       .end    = 0x0001ffff,
        .flags  = IORESOURCE_IO,
        .name   = "PCI I/O Space"
 };