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drm/meson: Fix plane atomic check when no crtc for the plane

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When no CRTC is associated with the plane, the meson_plane_atomic_check()
call breaks the kernel with an Oops.

Fixes: bbbe775ec5 ("drm: Add support for Amlogic Meson Graphic Controller")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong 2017-01-02 16:09:59 +01:00
parent 0c744ea4f7
commit dcafc45dcb
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/meson/meson_plane.c
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@ -51,6 +51,9 @@ static int meson_plane_atomic_check(struct drm_plane *plane,
struct drm_crtc_state *crtc_state; struct drm_crtc_state *crtc_state;
struct drm_rect clip = { 0, }; struct drm_rect clip = { 0, };
if (!state->crtc)
return 0;
crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc); crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
if (IS_ERR(crtc_state)) if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state); return PTR_ERR(crtc_state);