Hi Jani, I love your patch! Perhaps something to improve: [auto build test WARNING on drm-tip/drm-tip] [also build test WARNING on next-20220411] [cannot apply to drm/drm-next drm-intel/for-linux-next v5.18-rc2] [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/intel-lab-lkp/linux/commits/Jani-Nikula/drm-edid-low-level-EDID-block-read-refactoring-etc/20220411-175027 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: i386-randconfig-a001-20220411 (https://download.01.org/0day-ci/archive/20220411/202204112019.U9iIZWqP-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c6e83f560f06cdfe8aa47b248d8bdc58f947274b) 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/intel-lab-lkp/linux/commit/ba74d3cc8cc1b6ba4c34a039e797994ddbc77567 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Jani-Nikula/drm-edid-low-level-EDID-block-read-refactoring-etc/20220411-175027 git checkout ba74d3cc8cc1b6ba4c34a039e797994ddbc77567 # 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/ 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/drm_edid.c:2170:6: warning: logical not is only applied to the left hand side of this comparison [-Wlogical-not-parentheses] if (!edid_extension_block_count(edid) == 0) ^ ~~ drivers/gpu/drm/drm_edid.c:2170:6: note: add parentheses after the '!' to evaluate the comparison first if (!edid_extension_block_count(edid) == 0) ^ ( ) drivers/gpu/drm/drm_edid.c:2170:6: note: add parentheses around left hand side expression to silence this warning if (!edid_extension_block_count(edid) == 0) ^ ( ) 1 warning generated. vim +2170 drivers/gpu/drm/drm_edid.c 2112 2113 /** 2114 * drm_do_get_edid - get EDID data using a custom EDID block read function 2115 * @connector: connector we're probing 2116 * @get_edid_block: EDID block read function 2117 * @data: private data passed to the block read function 2118 * 2119 * When the I2C adapter connected to the DDC bus is hidden behind a device that 2120 * exposes a different interface to read EDID blocks this function can be used 2121 * to get EDID data using a custom block read function. 2122 * 2123 * As in the general case the DDC bus is accessible by the kernel at the I2C 2124 * level, drivers must make all reasonable efforts to expose it as an I2C 2125 * adapter and use drm_get_edid() instead of abusing this function. 2126 * 2127 * The EDID may be overridden using debugfs override_edid or firmware EDID 2128 * (drm_load_edid_firmware() and drm.edid_firmware parameter), in this priority 2129 * order. Having either of them bypasses actual EDID reads. 2130 * 2131 * Return: Pointer to valid EDID or NULL if we couldn't find any. 2132 */ 2133 struct edid *drm_do_get_edid(struct drm_connector *connector, 2134 read_block_fn read_block, 2135 void *context) 2136 { 2137 enum edid_block_status status; 2138 int i, invalid_blocks = 0; 2139 struct edid *edid, *new; 2140 2141 edid = drm_get_override_edid(connector); 2142 if (edid) 2143 goto ok; 2144 2145 edid = kmalloc(EDID_LENGTH, GFP_KERNEL); 2146 if (!edid) 2147 return NULL; 2148 2149 status = edid_block_read(edid, 0, read_block, context); 2150 2151 edid_block_status_print(status, edid, 0); 2152 2153 if (status == EDID_BLOCK_READ_FAIL) 2154 goto fail; 2155 2156 /* FIXME: Clarify what a corrupt EDID actually means. */ 2157 if (status == EDID_BLOCK_OK || status == EDID_BLOCK_VERSION) 2158 connector->edid_corrupt = false; 2159 else 2160 connector->edid_corrupt = true; 2161 2162 if (!edid_block_status_valid(status, edid_block_tag(edid))) { 2163 if (status == EDID_BLOCK_ZERO) 2164 connector->null_edid_counter++; 2165 2166 connector_bad_edid(connector, edid, 1); 2167 goto fail; 2168 } 2169 > 2170 if (!edid_extension_block_count(edid) == 0) 2171 goto ok; 2172 2173 new = krealloc(edid, edid_size(edid), GFP_KERNEL); 2174 if (!new) 2175 goto fail; 2176 edid = new; 2177 2178 for (i = 1; i < edid_block_count(edid); i++) { 2179 void *block = (void *)edid_block_data(edid, i); 2180 2181 status = edid_block_read(block, i, read_block, context); 2182 2183 edid_block_status_print(status, block, i); 2184 2185 if (!edid_block_status_valid(status, edid_block_tag(block))) { 2186 if (status == EDID_BLOCK_READ_FAIL) 2187 goto fail; 2188 invalid_blocks++; 2189 } 2190 } 2191 2192 if (invalid_blocks) { 2193 connector_bad_edid(connector, edid, edid_block_count(edid)); 2194 2195 edid = edid_filter_invalid_blocks(edid, invalid_blocks); 2196 } 2197 2198 ok: 2199 return edid; 2200 2201 fail: 2202 kfree(edid); 2203 return NULL; 2204 } 2205 EXPORT_SYMBOL_GPL(drm_do_get_edid); 2206 -- 0-DAY CI Kernel Test Service https://01.org/lkp
