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Diffstat (limited to 'arch/x86/pci/i386.c')
-rw-r--r--arch/x86/pci/i386.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index bcd2f94b732..055187bc255 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -33,6 +33,15 @@
#include "pci.h"
+static int
+skip_isa_ioresource_align(struct pci_dev *dev) {
+
+ if ((pci_probe & PCI_CAN_SKIP_ISA_ALIGN) &&
+ (dev->bus->bridge_ctl & PCI_BRIDGE_CTL_NO_ISA))
+ return 1;
+ return 0;
+}
+
/*
* We need to avoid collisions with `mirrored' VGA ports
* and other strange ISA hardware, so we always want the
@@ -50,9 +59,13 @@ void
pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
+ struct pci_dev *dev = data;
+
if (res->flags & IORESOURCE_IO) {
resource_size_t start = res->start;
+ if (skip_isa_ioresource_align(dev))
+ return;
if (start & 0x300) {
start = (start + 0x3ff) & ~0x3ff;
res->start = start;