On 10/12/2020 20:06, kernel test robot wrote:
> Hi Tomi,
> 
> I love your patch! Perhaps something to improve:
> 
> [auto build test WARNING on drm-intel/for-linux-next]
> [also build test WARNING on linus/master v5.10-rc7]
> [cannot apply to drm-tip/drm-tip anholt/for-next next-20201210]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
> 
> url:    https://github.com/0day-ci/linux/commits/Tomi-Valkeinen/drm-fix-and-cleanup-legacy-gamma-support/20201208-215917
> base:   git://anongit.freedesktop.org/drm-intel for-linux-next
> config: i386-randconfig-m021-20201209 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> New smatch warnings:
> drivers/gpu/drm/drm_color_mgmt.c:307 drm_crtc_legacy_gamma_set() error: potential null dereference 'blob'.  (drm_property_create_blob returns null)

I don't see how this could happen. There's no code path I see where drm_property_create_blob could
return null...

 Tomi

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