[chrome-os:chromeos-5.4 31/83] drivers/gpu/drm/i915/display/intel_sprite.c:2273:42: warning: Possible null pointer dereference: obj [nullPointer]

[chrome-os:chromeos-5.4 31/83] drivers/gpu/drm/i915/display/intel_sprite.c:2273:42: warning: Possible null pointer dereference: obj [nullPointer]

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
TO: cros-kernel-buildreports(a)googlegroups.com
TO: Guenter Roeck <groeck@google.com>

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.4
head:   7ba45329e79ddb80de9234a8f0bd61b1c897261e
commit: 2b9613b207a96e9b2fa9fb8545dcdc5ed6c4a61a [31/83] FROMGIT: BACKPORT: drm/i915: Move the pxp plane state computation
:::::: branch date: 11 hours ago
:::::: commit date: 8 days ago
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> drivers/gpu/drm/i915/display/intel_sprite.c:2273:42: warning: Possible null pointer dereference: obj [nullPointer]
    struct drm_i915_private *i915 = to_i915(obj->base.dev);
                                            ^
   drivers/gpu/drm/i915/display/intel_sprite.c:2330:50: note: Calling function 'bo_has_valid_encryption', 1st argument '(fb)?to_intel_bo(fb->obj[0]):NULL' value is 0
     plane_state->decrypt = bo_has_valid_encryption(intel_fb_obj(fb));
                                                    ^
   drivers/gpu/drm/i915/display/intel_sprite.c:2273:42: note: Null pointer dereference
    struct drm_i915_private *i915 = to_i915(obj->base.dev);
                                            ^
   drivers/gpu/drm/i915/display/intel_sprite.c:1492:2: warning: Variable 'i' is modified but its new value is never used. [unreadVariable]
    i++;
    ^
   drivers/gpu/drm/i915/display/intel_sprite.c:1521:2: warning: Variable 'i' is modified but its new value is never used. [unreadVariable]
    i++;
    ^
   drivers/gpu/drm/i915/display/intel_sprite.c:1831:2: warning: Variable 'i' is modified but its new value is never used. [unreadVariable]
    i++;
    ^

vim +2273 drivers/gpu/drm/i915/display/intel_sprite.c

80816bb6075585 Ville Syrjälä 2019-10-15  2270  
2b9613b207a96e Ville Syrjälä 2021-10-07  2271  static bool bo_has_valid_encryption(struct drm_i915_gem_object *obj)
2b9613b207a96e Ville Syrjälä 2021-10-07  2272  {
2b9613b207a96e Ville Syrjälä 2021-10-07 @2273  	struct drm_i915_private *i915 = to_i915(obj->base.dev);
2b9613b207a96e Ville Syrjälä 2021-10-07  2274  
2b9613b207a96e Ville Syrjälä 2021-10-07  2275  	return intel_pxp_key_check(&i915->gt.pxp, obj, false) == 0;
2b9613b207a96e Ville Syrjälä 2021-10-07  2276  }
2b9613b207a96e Ville Syrjälä 2021-10-07  2277  

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