[Intel-gfx] [PATCH 1/2] drm/i915/gt: Use the local HWSP offset during submission

[kernel test robot]

Hi Chris,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on drm-tip/drm-tip linus/master v5.9 next-20201021]
[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/Chris-Wilson/drm-i915-gt-Use-the-local-HWSP-offset-during-submission/20201022-060619
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-randconfig-s002-20201021 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-dirty
        # https://github.com/0day-ci/linux/commit/034e13871db55a3eed93d3157408443584dddd1f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Chris-Wilson/drm-i915-gt-Use-the-local-HWSP-offset-during-submission/20201022-060619
        git checkout 034e13871db55a3eed93d3157408443584dddd1f
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

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


"sparse warnings: (new ones prefixed by >>)"
>> drivers/gpu/drm/i915/gt/intel_lrc.c:3553:26: sparse: sparse: dereference of noderef expression

vim +3553 drivers/gpu/drm/i915/gt/intel_lrc.c

  3549	
  3550	static u32 hwsp_offset(struct i915_request *rq)
  3551	{
  3552		if (rq->hwsp_cacheline)
> 3553			return rq->hwsp_cacheline->ggtt_offset;
  3554		else
  3555			return i915_request_active_timeline(rq)->hwsp_offset;
  3556	}
  3557	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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