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-rw-r--r--arch/x86/pci/acpi.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 75ac3f856ea5..e31160216efb 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -123,7 +123,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
acpi_status status;
unsigned long flags;
struct resource *root, *conflict;
- u64 start, end;
+ u64 start, end, max_len;
status = resource_to_addr(acpi_res, &addr);
if (!ACPI_SUCCESS(status))
@@ -140,6 +140,17 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
} else
return AE_OK;
+ max_len = addr.maximum - addr.minimum + 1;
+ if (addr.address_length > max_len) {
+ dev_printk(KERN_DEBUG, &info->bridge->dev,
+ "host bridge window length %#llx doesn't fit in "
+ "%#llx-%#llx, trimming\n",
+ (unsigned long long) addr.address_length,
+ (unsigned long long) addr.minimum,
+ (unsigned long long) addr.maximum);
+ addr.address_length = max_len;
+ }
+
start = addr.minimum + addr.translation_offset;
end = start + addr.address_length - 1;