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drm/stm: ltdc: fix warning in ltdc_crtc_update_clut()

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Fix the warning
"warn: variable dereferenced before check 'crtc' (see line 390)"
by removing unnecessary checks as ltdc_crtc_update_clut() is
only called from ltdc_crtc_atomic_flush() where crtc and
crtc->state are not NULL.

Many thanks to Dan Carpenter for the bug report
https://lists.freedesktop.org/archives/dri-devel/2018-February/166918.html

Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: yannick fertre <yannick.fertre@st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180410135312.3553-1-philippe.cornu@st.com
This commit is contained in:
Philippe CORNU 2018-04-10 15:53:12 +02:00 committed by Philippe Cornu
parent 25bb1a9de3
commit c20f5f69c8
1 changed files with 0 additions and 3 deletions
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3
drivers/gpu/drm/stm/ltdc.c
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@ -392,9 +392,6 @@ static void ltdc_crtc_update_clut(struct drm_crtc *crtc)
u32 val;
int i;
if (!crtc || !crtc->state)
return;
if (!crtc->state->color_mgmt_changed || !crtc->state->gamma_lut)
return;