drm/radeon/kms: make sure rio_mem is valid before unmapping it

If we were not able to map the io bar in device init, don't attempt
to unmap it in device fini.  All radeons should have a io bar, so
I doubt this would ever trigger, but just to be on the safe side...

Pointed out by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 0fea894fc1271d428759b26fb8642a22b8394a71..a64811a94519a1ce5bd245d7f2c864e0d68ecf3d 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -737,7 +737,8 @@ void radeon_device_fini(struct radeon_device *rdev)
        destroy_workqueue(rdev->wq);
        vga_switcheroo_unregister_client(rdev->pdev);
        vga_client_register(rdev->pdev, NULL, NULL, NULL);
-       pci_iounmap(rdev->pdev, rdev->rio_mem);
+       if (rdev->rio_mem)
+               pci_iounmap(rdev->pdev, rdev->rio_mem);
        rdev->rio_mem = NULL;
        iounmap(rdev->rmmio);
        rdev->rmmio = NULL;