Since commit 8a357d10043c ("drm: Nerf DRM_CONTROL nodes"), a
struct drm_device's ->control member is always NULL.
In the case of CONFIG_DEBUG_FS=y, amdgpu_debugfs_add_files() accesses
->control->debugfs_root though. This results in a NULL pointer
dereference.
Fix this by omitting the drm_debugfs_create_files() call for the
control minor debugfs directory which is now non-existent anyway.
Fixes: 8a357d10043c ("drm: Nerf DRM_CONTROL nodes")
Signed-off-by: Nicolai Stange <nicstange@xxxxxxxxx>
---
Applicable to next-20161202. Compile-only tested.
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index deee2db..0cb3e82 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2493,9 +2493,6 @@ int amdgpu_debugfs_add_files(struct amdgpu_device *adev,
adev->debugfs_count = i;
#if defined(CONFIG_DEBUG_FS)
drm_debugfs_create_files(files, nfiles,
- adev->ddev->control->debugfs_root,
- adev->ddev->control);
- drm_debugfs_create_files(files, nfiles,
adev->ddev->primary->debugfs_root,
adev->ddev->primary);
#endif
@@ -2510,9 +2507,6 @@ static void amdgpu_debugfs_remove_files(struct amdgpu_device *adev)
for (i = 0; i < adev->debugfs_count; i++) {
drm_debugfs_remove_files(adev->debugfs[i].files,
adev->debugfs[i].num_files,
- adev->ddev->control);
- drm_debugfs_remove_files(adev->debugfs[i].files,
- adev->debugfs[i].num_files,
adev->ddev->primary);
}
#endif
--
2.10.2
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