From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 12 Apr 2013 23:15:52 +0000 (-0400)
Subject: drm/radeon: cleanup properly if mmio mapping fails
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0cd9cb76ae26a19df21abc6f94f5fff141e689c7;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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
---

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;