drm: Clear e after kfree in drm_mode_page_flip_ioctl
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 30 Mar 2017 13:32:53 +0000 (15:32 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 30 Mar 2017 18:23:51 +0000 (20:23 +0200)
commit031e5896dfdc24839d60f168f6e8560e294674d3
treee6936f46b2930d4f1372b72d0f9d2fe460fd61e0
parentf5f4c615982ddf9b898439cd039e5af6697c1c3e
drm: Clear e after kfree in drm_mode_page_flip_ioctl

With the explicit retry loop static analyzers get confused by the
control flow and believe that e could be accessed after kfree. That's
not possible, but it's non-obvious, so let's clear it to NULL.

We already cleared e = NULL at the top of the function, so this is all
in line.

Cc: Julia Lawall <julia.lawall@lip6.fr>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Fixes: 29dc0d1de182 ("drm: Roll out acquire context for the page_flip ioctl")
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170330133253.29500-1-daniel.vetter@ffwll.ch
drivers/gpu/drm/drm_plane.c