x86/PCI: reduce severity of host bridge window conflict warnings

Host bridge windows are top-level resources, so if we find a host bridge
window conflict, it's probably with a hard-coded legacy reservation.
Moving host bridge windows is theoretically possible, but we don't support
it; we just ignore windows with conflicts, and it's not worth making this
a user-visible error.

Reported-and-tested-by: Jools Wills <jools@oxfordinspire.co.uk>
References: https://bugzilla.kernel.org/show_bug.cgi?id=38522
Reported-by: Das <dasfox@gmail.com>
References: https://bugzilla.kernel.org/show_bug.cgi?id=16497
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 68c3c1395202eec5ad68bfc584d14ee9f4c1975e..ae3cb23cd89b86cdecbc6e202fb7e2d912079cf5 100644 (file)
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -246,10 +246,9 @@ static void add_resources(struct pci_root_info *info)
 
                conflict = insert_resource_conflict(root, res);
                if (conflict)
-                       dev_err(&info->bridge->dev,
-                               "address space collision: host bridge window %pR "
-                               "conflicts with %s %pR\n",
-                               res, conflict->name, conflict);
+                       dev_info(&info->bridge->dev,
+                                "ignoring host bridge window %pR (conflicts with %s %pR)\n",
+                                res, conflict->name, conflict);
                else
                        pci_bus_add_resource(info->bus, res, 0);
        }