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ARM: PCI: versatile: Fix PCI I/O

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The versatile PCI controller code was confused between the
PCI I/O window (at 0x43000000) and the first PCI memory
window (at 0x44000000). Pass the correct base address to
pci_remap_io() so that PCI I/O accesses work.

Since the first PCI memory window isn't used at all (it's
an odd size), rename the associated variables and labels
so that it's clear that it isn't related to the I/O window.

This has been tested and confirmed to fix PCI I/O accesses
both on physical PB926+PCI backplane hardware and on QEMU.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Cc: stable@vger.kernel.org
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
This commit is contained in:
Peter Maydell
2013-08-22 17:47:49 +01:00
committed by Kevin Hilman
parent f9b71fef12
commit 829f9fedee
2 changed files with 10 additions and 8 deletions
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16
arch/arm/mach-versatile/pci.c
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@@ -170,8 +170,8 @@ static struct pci_ops pci_versatile_ops = {
.write = versatile_write_config,
};
static struct resource io_mem = {
.name = "PCI I/O space",
static struct resource unused_mem = {
.name = "PCI unused",
.start = VERSATILE_PCI_MEM_BASE0,
.end = VERSATILE_PCI_MEM_BASE0+VERSATILE_PCI_MEM_BASE0_SIZE-1,
.flags = IORESOURCE_MEM,
@@ -195,9 +195,9 @@ static int __init pci_versatile_setup_resources(struct pci_sys_data *sys)
{
int ret = 0;
ret = request_resource(&iomem_resource, &io_mem);
ret = request_resource(&iomem_resource, &unused_mem);
if (ret) {
printk(KERN_ERR "PCI: unable to allocate I/O "
printk(KERN_ERR "PCI: unable to allocate unused "
"memory region (%d)\n", ret);
goto out;
}
@@ -205,7 +205,7 @@ static int __init pci_versatile_setup_resources(struct pci_sys_data *sys)
if (ret) {
printk(KERN_ERR "PCI: unable to allocate non-prefetchable "
"memory region (%d)\n", ret);
goto release_io_mem;
goto release_unused_mem;
}
ret = request_resource(&iomem_resource, &pre_mem);
if (ret) {
@@ -225,8 +225,8 @@ static int __init pci_versatile_setup_resources(struct pci_sys_data *sys)
release_non_mem:
release_resource(&non_mem);
release_io_mem:
release_resource(&io_mem);
release_unused_mem:
release_resource(&unused_mem);
out:
return ret;
}
@@ -246,7 +246,7 @@ int __init pci_versatile_setup(int nr, struct pci_sys_data *sys)
goto out;
}
ret = pci_ioremap_io(0, VERSATILE_PCI_MEM_BASE0);
ret = pci_ioremap_io(0, VERSATILE_PCI_IO_BASE);
if (ret)
goto out;