[linux-next:master 1413/2025] drivers/gpu/drm/i915/gvt/aperture_gm.c:326:9: sparse: sparse: Using plain integer as NULL pointer

[linux-next:master 1413/2025] drivers/gpu/drm/i915/gvt/aperture_gm.c:326:9: sparse: sparse: Using plain integer as NULL pointer

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   fe21733536749bb1b31c9c84e0b8d2ab8d82ce13
commit: 2edc6a75f26c112d90ca67ff412ba79622069818 [1413/2025] drm/i915: switch intel_wakeref_t underlying type to struct ref_tracker *
config: x86_64-randconfig-r122-20241002 (https://download.01.org/0day-ci/archive/20241002/202410021951.KfCEVbgG-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241002/202410021951.KfCEVbgG-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410021951.KfCEVbgG-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/i915/gvt/aperture_gm.c:326:9: sparse: sparse: Using plain integer as NULL pointer
--
>> drivers/gpu/drm/i915/gvt/scheduler.c:1756:17: sparse: sparse: Using plain integer as NULL pointer
   drivers/gpu/drm/i915/gvt/scheduler.c: note: in included file (through include/linux/smp.h, include/linux/lockdep.h, include/linux/spinlock.h, ...):
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true

vim +326 drivers/gpu/drm/i915/gvt/aperture_gm.c

28a60dee2ce602 Zhi Wang     2016-09-02  313  
d22a48bf7302ef Changbin Du  2017-01-13  314  /**
d22a48bf7302ef Changbin Du  2017-01-13  315   * intel_vgpu_reset_resource - reset resource state owned by a vGPU
d22a48bf7302ef Changbin Du  2017-01-13  316   * @vgpu: a vGPU
d22a48bf7302ef Changbin Du  2017-01-13  317   *
d22a48bf7302ef Changbin Du  2017-01-13  318   * This function is used to reset resource state owned by a vGPU.
d22a48bf7302ef Changbin Du  2017-01-13  319   *
d22a48bf7302ef Changbin Du  2017-01-13  320   */
d22a48bf7302ef Changbin Du  2017-01-13  321  void intel_vgpu_reset_resource(struct intel_vgpu *vgpu)
d22a48bf7302ef Changbin Du  2017-01-13  322  {
a61ac1e75105a0 Chris Wilson 2020-03-06  323  	struct intel_gvt *gvt = vgpu->gvt;
a61ac1e75105a0 Chris Wilson 2020-03-06  324  	intel_wakeref_t wakeref;
d22a48bf7302ef Changbin Du  2017-01-13  325  
a61ac1e75105a0 Chris Wilson 2020-03-06 @326  	with_intel_runtime_pm(gvt->gt->uncore->rpm, wakeref)
d22a48bf7302ef Changbin Du  2017-01-13  327  		_clear_vgpu_fence(vgpu);
d22a48bf7302ef Changbin Du  2017-01-13  328  }
d22a48bf7302ef Changbin Du  2017-01-13  329  

:::::: The code at line 326 was first introduced by commit
:::::: a61ac1e75105a077ec1efd6923ae3c619f862304 drm/i915/gvt: Wean gvt off using dev_priv

:::::: TO: Chris Wilson <chris@chris-wilson.co.uk>
:::::: CC: Zhenyu Wang <zhenyuw@linux.intel.com>

-- 
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https://github.com/intel/lkp-tests/wiki