From 0853695c3ba46f97dfc0b5885f7b7e640ca212dd Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Fri, 14 Oct 2016 13:18:18 +0100 Subject: drm: Add reference counting to drm_atomic_state drm_atomic_state has a complicated single owner model that tracks the single reference from allocation through to destruction on another thread - or perhaps on a local error path. We can simplify this tracking by using reference counting (at a cost of a few more atomics). This is even more beneficial when the lifetime of the state becomes more convoluted than being passed to a single worker thread for the commit. v2: Double check !intel atomic_commit functions for missing gets v3: Update kerneldocs Signed-off-by: Chris Wilson Cc: Daniel Vetter Cc: dri-devel@lists.freedesktop.org Reviewed-by: Eric Engestrom Reviewed-by: Sean Paul Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20161014121833.439-27-chris@chris-wilson.co.uk --- drivers/gpu/drm/tegra/drm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/tegra') diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 8ab47b502d83..a9630c2d6cb3 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -63,7 +63,7 @@ static void tegra_atomic_complete(struct tegra_drm *tegra, drm_atomic_helper_wait_for_vblanks(drm, state); drm_atomic_helper_cleanup_planes(drm, state); - drm_atomic_state_free(state); + drm_atomic_state_put(state); } static void tegra_atomic_work(struct work_struct *work) @@ -96,6 +96,7 @@ static int tegra_atomic_commit(struct drm_device *drm, drm_atomic_helper_swap_state(state, true); + drm_atomic_state_get(state); if (nonblock) tegra_atomic_schedule(tegra, state); else -- cgit v1.2.3-55-g7522