Hi Dharma, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on linus/master v6.9-rc4 next-20240419] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Dharma-Balasubiramani/dt-bindings-display-bridge-add-sam9x75-lvds-binding/20240418-170157 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20240418085725.373797-3-dharma.b%40microchip.com patch subject: [PATCH v7 2/4] drm/bridge: add lvds controller support for sam9x7 config: arm-at91_dt_defconfig (https://download.01.org/0day-ci/archive/20240421/202404210232.jI4lxq3k-lkp@xxxxxxxxx/config) compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7089c359a3845323f6f30c44a47dd901f2edfe63) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240421/202404210232.jI4lxq3k-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202404210232.jI4lxq3k-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/bridge/microchip-lvds.c:17: In file included from include/linux/phy/phy.h:17: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:21: In file included from include/linux/mm.h:2208: include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ >> drivers/gpu/drm/bridge/microchip-lvds.c:199:6: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] 199 | if (ret < 0) { | ^~~ drivers/gpu/drm/bridge/microchip-lvds.c:154:9: note: initialize the variable 'ret' to silence this warning 154 | int ret; | ^ | = 0 2 warnings generated. vim +/ret +199 drivers/gpu/drm/bridge/microchip-lvds.c 148 149 static int mchp_lvds_probe(struct platform_device *pdev) 150 { 151 struct device *dev = &pdev->dev; 152 struct mchp_lvds *lvds; 153 struct device_node *port; 154 int ret; 155 156 if (!dev->of_node) 157 return -ENODEV; 158 159 lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL); 160 if (!lvds) 161 return -ENOMEM; 162 163 lvds->dev = dev; 164 165 lvds->regs = devm_ioremap_resource(lvds->dev, 166 platform_get_resource(pdev, IORESOURCE_MEM, 0)); 167 if (IS_ERR(lvds->regs)) 168 return PTR_ERR(lvds->regs); 169 170 lvds->pclk = devm_clk_get(lvds->dev, "pclk"); 171 if (IS_ERR(lvds->pclk)) 172 return dev_err_probe(lvds->dev, PTR_ERR(lvds->pclk), 173 "could not get pclk_lvds\n"); 174 175 port = of_graph_get_remote_node(dev->of_node, 1, 0); 176 if (!port) { 177 dev_err(dev, 178 "can't find port point, please init lvds panel port!\n"); 179 return -ENODEV; 180 } 181 182 lvds->panel = of_drm_find_panel(port); 183 of_node_put(port); 184 185 if (IS_ERR(lvds->panel)) 186 return -EPROBE_DEFER; 187 188 lvds->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); 189 190 if (IS_ERR(lvds->panel_bridge)) 191 return PTR_ERR(lvds->panel_bridge); 192 193 lvds->bridge.of_node = dev->of_node; 194 lvds->bridge.type = DRM_MODE_CONNECTOR_LVDS; 195 lvds->bridge.funcs = &mchp_lvds_bridge_funcs; 196 197 dev_set_drvdata(dev, lvds); 198 devm_pm_runtime_enable(dev); > 199 if (ret < 0) { 200 dev_err(lvds->dev, "failed to enable pm runtime: %d\n", ret); 201 return ret; 202 } 203 204 drm_bridge_add(&lvds->bridge); 205 206 return 0; 207 } 208 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
