Hello Thierry Reding,
This is a semi-automatic email about new static checker warnings.
The patch a4bfa0961c4b: "drm/tegra: dc: Simplify atomic plane helper
functions" from Aug 30, 2017, leads to the following Smatch complaint:
drivers/gpu/drm/tegra/dc.c:562 tegra_plane_atomic_disable()
warn: variable dereferenced before check 'old_state' (see line 556)
drivers/gpu/drm/tegra/dc.c
555 {
556 struct tegra_dc *dc = to_tegra_dc(old_state->crtc);
^^^^^^^^^^^^^^^
Patch adds dereference
557 struct tegra_plane *p = to_tegra_plane(plane);
558 unsigned long flags;
559 u32 value;
560
561 /* rien ne va plus */
^^^^^^^^^^^^^^^
Patch adds some culture which the kernel was sorely in need of.
562 if (!old_state || !old_state->crtc)
^^^^^^^^^
Patch adds check
563 return;
564
regards,
dan carpenter
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