diff options
| author | Drew Davenport <ddavenport@chromium.org> | 2017-10-27 12:34:46 -0600 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-11-02 12:58:41 -0400 |
| commit | f5ba60fefa00ca789c4eb35df38b171d532b3155 (patch) | |
| tree | b2a1190330d9a4ecfd21cee02ad8dfcdaf1013c4 /drivers/gpu/drm/amd/display/amdgpu_dm | |
| parent | 30b7c6147d18d77c6120a8f689d04d2518d3f5e4 (diff) | |
amdgpu/dc: Avoid dereferencing NULL pointer
crtc is dereferenced from within drm_atomic_get_new_crtc_state, so
check for NULL before initializing new_crtc_state.
Signed-off-by: Drew Davenport <ddavenport@chromium.org>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index b94987bb6af9..84591781fca1 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3853,8 +3853,7 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state, /* update planes when needed */ for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { struct drm_crtc *crtc = new_plane_state->crtc; - struct drm_crtc_state *new_crtc_state = - drm_atomic_get_new_crtc_state(state, crtc); + struct drm_crtc_state *new_crtc_state; struct drm_framebuffer *fb = new_plane_state->fb; bool pflip_needed; struct dm_plane_state *dm_new_plane_state = to_dm_plane_state(new_plane_state); @@ -3864,7 +3863,11 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state, continue; } - if (!fb || !crtc || pcrtc != crtc || !new_crtc_state->active) + if (!fb || !crtc || pcrtc != crtc) + continue; + + new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc); + if (!new_crtc_state->active) continue; pflip_needed = !state->allow_modeset; |