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;