Hi Rodrigo
On Mon, Mar 11, 2019 at 06:01:20PM -0300, Rodrigo Siqueira wrote:
> The function disable_outputs() and
> drm_atomic_helper_commit_modeset_enables() tries to retrieve
> helper_private from the target CRTC, for dereferencing some operations.
> However, the current implementation does not check whether
> helper_private is null and, if not, if it has a valid pointer to a dpms
> and commit functions. This commit adds pointer validations before
> trying to dereference the dpms and commit function.
>
> Signed-off-by: Rodrigo Siqueira <rodrigosiqueiram...@gmail.com>
> ---
> drivers/gpu/drm/drm_atomic_helper.c | 30 ++++++++++++++++-------------
> 1 file changed, 17 insertions(+), 13 deletions(-)
>
> @@ -1277,11 +1279,13 @@ void drm_atomic_helper_commit_modeset_enables(struct
> drm_device *dev,
> if (new_crtc_state->enable) {
> DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
> crtc->base.id, crtc->name);
This DEBUG_ print is only relevant if the code actually
do something in the following.
So it seems more correct to fix the upper if () to:
> if (new_crtc_state->enable && funcs != NULL) {
> DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
...
The you also loose one indent and the calls are nicer.
(If used "funcs != NULL", but this is a matter of taste).
Sam
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