Hi Yongzhi, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on v5.17-rc5 next-20220217] [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/Yongzhi-Liu/drm-i915-Check-input-parameter-for-NULL/20220221-225508 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: i386-randconfig-a014-20220221 (https://download.01.org/0day-ci/archive/20220222/202202220722.25BhJJ6r-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/c54be425a38b3f4cb82c5badecf6b343f9e24a90 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Yongzhi-Liu/drm-i915-Check-input-parameter-for-NULL/20220221-225508 git checkout c54be425a38b3f4cb82c5badecf6b343f9e24a90 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/i915/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/gpu/drm/i915/gem/i915_gem_phys.c:100:13: warning: mixing declarations and code is a C99 extension [-Wdeclaration-after-statement] dma_addr_t dma = sg_dma_address(pages->sgl); ^ 1 warning generated. vim +100 drivers/gpu/drm/i915/gem/i915_gem_phys.c f033428db28bdf Chris Wilson 2019-05-28 93 a61170975718d5 Maarten Lankhorst 2021-03-23 94 void f033428db28bdf Chris Wilson 2019-05-28 95 i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj, f033428db28bdf Chris Wilson 2019-05-28 96 struct sg_table *pages) f033428db28bdf Chris Wilson 2019-05-28 97 { c54be425a38b3f Yongzhi Liu 2022-02-21 98 if (!pages) c54be425a38b3f Yongzhi Liu 2022-02-21 99 return; c6790dc22312f5 Chris Wilson 2020-02-02 @100 dma_addr_t dma = sg_dma_address(pages->sgl); c6790dc22312f5 Chris Wilson 2020-02-02 101 void *vaddr = sg_page(pages->sgl); c6790dc22312f5 Chris Wilson 2020-02-02 102 f033428db28bdf Chris Wilson 2019-05-28 103 __i915_gem_object_release_shmem(obj, pages, false); f033428db28bdf Chris Wilson 2019-05-28 104 f033428db28bdf Chris Wilson 2019-05-28 105 if (obj->mm.dirty) { f033428db28bdf Chris Wilson 2019-05-28 106 struct address_space *mapping = obj->base.filp->f_mapping; c6790dc22312f5 Chris Wilson 2020-02-02 107 void *src = vaddr; f033428db28bdf Chris Wilson 2019-05-28 108 int i; f033428db28bdf Chris Wilson 2019-05-28 109 f033428db28bdf Chris Wilson 2019-05-28 110 for (i = 0; i < obj->base.size / PAGE_SIZE; i++) { f033428db28bdf Chris Wilson 2019-05-28 111 struct page *page; f033428db28bdf Chris Wilson 2019-05-28 112 char *dst; f033428db28bdf Chris Wilson 2019-05-28 113 f033428db28bdf Chris Wilson 2019-05-28 114 page = shmem_read_mapping_page(mapping, i); f033428db28bdf Chris Wilson 2019-05-28 115 if (IS_ERR(page)) f033428db28bdf Chris Wilson 2019-05-28 116 continue; f033428db28bdf Chris Wilson 2019-05-28 117 f033428db28bdf Chris Wilson 2019-05-28 118 dst = kmap_atomic(page); c6790dc22312f5 Chris Wilson 2020-02-02 119 drm_clflush_virt_range(src, PAGE_SIZE); c6790dc22312f5 Chris Wilson 2020-02-02 120 memcpy(dst, src, PAGE_SIZE); f033428db28bdf Chris Wilson 2019-05-28 121 kunmap_atomic(dst); f033428db28bdf Chris Wilson 2019-05-28 122 f033428db28bdf Chris Wilson 2019-05-28 123 set_page_dirty(page); f033428db28bdf Chris Wilson 2019-05-28 124 if (obj->mm.madv == I915_MADV_WILLNEED) f033428db28bdf Chris Wilson 2019-05-28 125 mark_page_accessed(page); f033428db28bdf Chris Wilson 2019-05-28 126 put_page(page); c6790dc22312f5 Chris Wilson 2020-02-02 127 c6790dc22312f5 Chris Wilson 2020-02-02 128 src += PAGE_SIZE; f033428db28bdf Chris Wilson 2019-05-28 129 } f033428db28bdf Chris Wilson 2019-05-28 130 obj->mm.dirty = false; f033428db28bdf Chris Wilson 2019-05-28 131 } f033428db28bdf Chris Wilson 2019-05-28 132 f033428db28bdf Chris Wilson 2019-05-28 133 sg_free_table(pages); f033428db28bdf Chris Wilson 2019-05-28 134 kfree(pages); f033428db28bdf Chris Wilson 2019-05-28 135 8ff5446a7ca47c Thomas Zimmermann 2021-01-28 136 dma_free_coherent(obj->base.dev->dev, c6790dc22312f5 Chris Wilson 2020-02-02 137 roundup_pow_of_two(obj->base.size), c6790dc22312f5 Chris Wilson 2020-02-02 138 vaddr, dma); f033428db28bdf Chris Wilson 2019-05-28 139 } f033428db28bdf Chris Wilson 2019-05-28 140 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
