tree 6c2a6a7f44cd99337b0014b3e3f52ee0dc7aaf20
parent 548ae867efb1741fa55cedb5e73d7d0e75acd1f2
author Giulio Benetti <giulio.benetti@micronovasrl.com> 1538776791 +0200
committer Maxime Ripard <maxime.ripard@bootlin.com> 1538990455 +0200
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drm/sun4i: tcon: prevent tcon->panel dereference if NULL

If tcon->panel pointer is NULL, trying to dereference from it
(i.e. tcon->panel->connector) will cause a null pointer dereference.

Add tcon->panel null pointer check before calling
sun4i_tcon0_mode_set_dithering().

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Fixes: f11adcecbd5f ("drm/sun4i: tcon: Add dithering support for
                      RGB565/RGB666 LCD panels")
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181005215951.99003-2-giulio.benetti@micronovasrl.com