[drm-drm-intel:for-linux-next-fixes 1/1] drivers/gpu/drm/i915/i915_gem_gtt.c:1180:18: error: request for member 'sg' in something not a structure or union

[drm-drm-intel:for-linux-next-fixes 1/1] drivers/gpu/drm/i915/i915_gem_gtt.c:1180:18: error: request for member 'sg' in something not a structure or union

[kbuild test robot]

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tree:   git://anongit.freedesktop.org/drm/drm-intel for-linux-next-fixes
head:   d8fcca47e1950b1bccd2846cafb0f4e941b5ac2c
commit: d8fcca47e1950b1bccd2846cafb0f4e941b5ac2c [1/1] drm/i915/userptr: fix size calculation
config: x86_64-randconfig-a001-20200120 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
reproduce:
        git checkout d8fcca47e1950b1bccd2846cafb0f4e941b5ac2c
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from include/linux/kernel.h:16:0,
                    from include/asm-generic/bug.h:19,
                    from arch/x86/include/asm/bug.h:83,
                    from include/linux/bug.h:5,
                    from include/linux/mmdebug.h:5,
                    from include/linux/gfp.h:5,
                    from include/linux/slab.h:15,
                    from drivers/gpu/drm/i915/i915_gem_gtt.c:26:
   drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen8_ppgtt_insert_pte':
>> drivers/gpu/drm/i915/i915_gem_gtt.c:1180:18: error: request for member 'sg' in something not a structure or union
      GEM_BUG_ON(iter.sg->length < I915_GTT_PAGE_SIZE);
                     ^
   include/linux/build_bug.h:30:63: note: in definition of macro 'BUILD_BUG_ON_INVALID'
    #define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))
                                                                  ^
   drivers/gpu/drm/i915/i915_gem_gtt.c:1180:3: note: in expansion of macro 'GEM_BUG_ON'
      GEM_BUG_ON(iter.sg->length < I915_GTT_PAGE_SIZE);
      ^

vim +/sg +1180 drivers/gpu/drm/i915/i915_gem_gtt.c

  1164	
  1165	static __always_inline u64
  1166	gen8_ppgtt_insert_pte(struct i915_ppgtt *ppgtt,
  1167			      struct i915_page_directory *pdp,
  1168			      struct sgt_dma *iter,
  1169			      u64 idx,
  1170			      enum i915_cache_level cache_level,
  1171			      u32 flags)
  1172	{
  1173		struct i915_page_directory *pd;
  1174		const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags);
  1175		gen8_pte_t *vaddr;
  1176	
  1177		pd = i915_pd_entry(pdp, gen8_pd_index(idx, 2));
  1178		vaddr = kmap_atomic_px(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
  1179		do {
> 1180			GEM_BUG_ON(iter.sg->length < I915_GTT_PAGE_SIZE);
  1181			vaddr[gen8_pd_index(idx, 0)] = pte_encode | iter->dma;
  1182	
  1183			iter->dma += I915_GTT_PAGE_SIZE;
  1184			if (iter->dma >= iter->max) {
  1185				iter->sg = __sg_next(iter->sg);
  1186				if (!iter->sg) {
  1187					idx = 0;
  1188					break;
  1189				}
  1190	
  1191				iter->dma = sg_dma_address(iter->sg);
  1192				iter->max = iter->dma + iter->sg->length;
  1193			}
  1194	
  1195			if (gen8_pd_index(++idx, 0) == 0) {
  1196				if (gen8_pd_index(idx, 1) == 0) {
  1197					/* Limited by sg length for 3lvl */
  1198					if (gen8_pd_index(idx, 2) == 0)
  1199						break;
  1200	
  1201					pd = pdp->entry[gen8_pd_index(idx, 2)];
  1202				}
  1203	
  1204				kunmap_atomic(vaddr);
  1205				vaddr = kmap_atomic_px(i915_pt_entry(pd, gen8_pd_index(idx, 1)));
  1206			}
  1207		} while (1);
  1208		kunmap_atomic(vaddr);
  1209	
  1210		return idx;
  1211	}
  1212	

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org Intel Corporation

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