[PATCH] drm/atomic: Make sure lock is held in trylock contexts.

This will make sure we get a lockdep spat in all cases even if the context is a complete garbage pointer.

Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com --- diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c index 9abee87c1501..7c9ca2381d78 100644 --- a/drivers/gpu/drm/drm_modeset_lock.c +++ b/drivers/gpu/drm/drm_modeset_lock.c @@ -305,6 +305,8 @@ static inline int modeset_lock(struct drm_modeset_lock *lock, WARN_ON(ctx->contended);

if (ctx->trylock_only) { + lockdep_assert_held(&ctx->ww_ctx); + if (!ww_mutex_trylock(&lock->mutex)) return -EBUSY; else