drm/radeon: cleanup properly if mmio mapping fails

If we fail to map the mmio BAR, skip driver tear down
that requires mmio.

Should fix:
https://bugzilla.kernel.org/show_bug.cgi?id=56541

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index a24b9ba4de73..4f2d4f4c1dab 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -50,9 +50,13 @@ int radeon_driver_unload_kms(struct drm_device *dev)
 
         if (rdev == NULL)
                 return 0;
+        if (rdev->rmmio == NULL)
+                goto done_free;
         radeon_acpi_fini(rdev);
         radeon_modeset_fini(rdev);
         radeon_device_fini(rdev);
+
+done_free:
         kfree(rdev);
         dev->dev_private = NULL;
         return 0;