Hi Alexander, On Fri, Jul 29, 2022 at 10:23:48AM +0200, Alexander Stein wrote: > Am Donnerstag, 28. Juli 2022, 23:10:07 CEST schrieb kernel test robot: > > Hi Alexander, > > > > Thank you for the patch! Perhaps something to improve: > > > > [auto build test WARNING on media-tree/master] > > [also build test WARNING on linus/master v5.19-rc8 next-20220728] > > [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/Alexander-Stein/OV9281-suppo > > rt/20220728-210448 base: git://linuxtv.org/media_tree.git master > > config: arm-randconfig-r022-20220728 > > (https://download.01.org/0day-ci/archive/20220729/202207290518.1D7MVS65-lkp > > @intel.com/config) compiler: clang version 15.0.0 > > (https://github.com/llvm/llvm-project > > 8dfaecc4c24494337933aff9d9166486ca0949f1) 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 > > # install arm cross compiling tool for clang build > > # apt-get install binutils-arm-linux-gnueabi > > # > > https://github.com/intel-lab-lkp/linux/commit/ee28006553d4d23f600b0076ef606 > > 6710519f156 git remote add linux-review > > https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review > > Alexander-Stein/OV9281-support/20220728-210448 git checkout > > ee28006553d4d23f600b0076ef6066710519f156 > > # save the config file > > mkdir build_dir && cp config build_dir/.config > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 > > O=build_dir ARCH=arm SHELL=/bin/bash drivers/media/i2c/ > > > > If you fix the issue, kindly add following tag where applicable > > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > > > All warnings (new ones prefixed by >>): > > >> drivers/media/i2c/ov9282.c:1054:10: warning: variable 'ret' is > > >> uninitialized when used here [-Wuninitialized] > > return ret; > > ^~~ > > drivers/media/i2c/ov9282.c:1041:9: note: initialize the variable 'ret' to > > silence this warning int ret; > > ^ > > = 0 > > 1 warning generated. > > > > > > vim +/ret +1054 drivers/media/i2c/ov9282.c > > > > 1030 > > 1031 /** > > 1032 * ov9282_probe() - I2C client device binding > > 1033 * @client: pointer to i2c client device > > 1034 * > > 1035 * Return: 0 if successful, error code otherwise. > > 1036 */ > > 1037 static int ov9282_probe(struct i2c_client *client) > > 1038 { > > 1039 struct ov9282 *ov9282; > > 1040 const char *sensor_name; > > 1041 int ret; > > 1042 > > 1043 ov9282 = devm_kzalloc(&client->dev, sizeof(*ov9282), > GFP_KERNEL); > > 1044 if (!ov9282) > > 1045 return -ENOMEM; > > 1046 > > 1047 ov9282->dev = &client->dev; > > 1048 > > 1049 /* Initialize subdev */ > > 1050 v4l2_i2c_subdev_init(&ov9282->sd, client, > &ov9282_subdev_ops); > > 1051 sensor_name = device_get_match_data(ov9282->dev); > > 1052 if (!sensor_name) { > > 1053 dev_err(ov9282->dev, "Sensor name is > missing"); > > > > > 1054 return ret; > > > > 1055 } > > 1056 v4l2_i2c_subdev_set_name(&ov9282->sd, client, > sensor_name, NULL); > > 1057 > > 1058 ret = ov9282_parse_hw_config(ov9282); > > 1059 if (ret) { > > 1060 dev_err(ov9282->dev, "HW configuration is not > supported"); > > 1061 return ret; > > 1062 } > > 1063 > > 1064 ret = ov9282_get_regulators(ov9282); > > 1065 if (ret) { > > 1066 dev_err(&client->dev, "Failed to get power > regulators\n"); > > 1067 return ret; > > 1068 } > > 1069 > > 1070 mutex_init(&ov9282->mutex); > > 1071 > > 1072 ret = ov9282_power_on(ov9282->dev); > > 1073 if (ret) { > > 1074 dev_err(ov9282->dev, "failed to power-on the > sensor"); > > 1075 goto error_mutex_destroy; > > 1076 } > > 1077 > > 1078 /* Check module identity */ > > 1079 ret = ov9282_detect(ov9282); > > 1080 if (ret) { > > 1081 dev_err(ov9282->dev, "failed to find sensor: > %d", ret); > > 1082 goto error_power_off; > > 1083 } > > 1084 > > 1085 /* Set default mode to max resolution */ > > 1086 ov9282->cur_mode = &supported_mode; > > 1087 ov9282->vblank = ov9282->cur_mode->vblank; > > 1088 > > 1089 ret = ov9282_init_controls(ov9282); > > 1090 if (ret) { > > 1091 dev_err(ov9282->dev, "failed to init > controls: %d", ret); > > 1092 goto error_power_off; > > 1093 } > > 1094 > > 1095 /* Initialize subdev */ > > 1096 ov9282->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; > > 1097 ov9282->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; > > 1098 > > 1099 /* Initialize source pad */ > > 1100 ov9282->pad.flags = MEDIA_PAD_FL_SOURCE; > > 1101 ret = media_entity_pads_init(&ov9282->sd.entity, 1, > &ov9282->pad); > > 1102 if (ret) { > > 1103 dev_err(ov9282->dev, "failed to init entity > pads: %d", ret); > > 1104 goto error_handler_free; > > 1105 } > > 1106 > > 1107 ret = v4l2_async_register_subdev_sensor(&ov9282->sd); > > 1108 if (ret < 0) { > > 1109 dev_err(ov9282->dev, > > 1110 "failed to register async subdev: > %d", ret); > > 1111 goto error_media_entity; > > 1112 } > > 1113 > > 1114 pm_runtime_set_active(ov9282->dev); > > 1115 pm_runtime_enable(ov9282->dev); > > 1116 pm_runtime_idle(ov9282->dev); > > 1117 > > 1118 return 0; > > 1119 > > 1120 error_media_entity: > > 1121 media_entity_cleanup(&ov9282->sd.entity); > > 1122 error_handler_free: > > 1123 v4l2_ctrl_handler_free(ov9282->sd.ctrl_handler); > > 1124 error_power_off: > > 1125 ov9282_power_off(ov9282->dev); > > 1126 error_mutex_destroy: > > 1127 mutex_destroy(&ov9282->mutex); > > 1128 > > 1129 return ret; > > 1130 } > > 1131 > > Meh, I'll come up with a fixed once discussion about the additional compatible > has settled. This will also include the missing member documentation in patch > 5 I think you could simply pass device_get_match_data() return value as the sensor name. The driver is in direct control of the string so I don't think you need error handling here. -- Sakari Ailus
