提交 e0c34051 编写于 作者: T Thierry Reding 提交者: Greg Kroah-Hartman

drm/tegra: hub: Fix dereference before check

[ Upstream commit 7cf77b273a8fc51e7de622fa6691abd4436a9a6b ]
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NSasha Levin (Microsoft) <sashal@kernel.org>
上级 abd76731
......@@ -378,14 +378,16 @@ static int tegra_shared_plane_atomic_check(struct drm_plane *plane,
static void tegra_shared_plane_atomic_disable(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct tegra_dc *dc = to_tegra_dc(old_state->crtc);
struct tegra_plane *p = to_tegra_plane(plane);
struct tegra_dc *dc;
u32 value;
/* rien ne va plus */
if (!old_state || !old_state->crtc)
return;
dc = to_tegra_dc(old_state->crtc);
/*
* XXX Legacy helpers seem to sometimes call ->atomic_disable() even
* on planes that are already disabled. Make sure we fallback to the
......
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