Hi Pengyu, kernel test robot noticed the following build warnings: [auto build test WARNING on 0907e7fb35756464aa34c35d6abb02998418164b] url: https://github.com/intel-lab-lkp/linux/commits/Pengyu-Luo/dt-bindings-platform-Add-Huawei-Matebook-E-Go-EC/20250117-220936 base: 0907e7fb35756464aa34c35d6abb02998418164b patch link: https://lore.kernel.org/r/20250117140348.180681-3-mitltlatltl%40gmail.com patch subject: [PATCH v5 2/3] platform: arm64: add Huawei Matebook E Go EC driver config: powerpc64-randconfig-r121-20250119 (https://download.01.org/0day-ci/archive/20250119/202501191043.a0w9KqJ6-lkp@xxxxxxxxx/config) compiler: powerpc64-linux-gcc (GCC) 14.2.0 reproduce: (https://download.01.org/0day-ci/archive/20250119/202501191043.a0w9KqJ6-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/202501191043.a0w9KqJ6-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/platform/arm64/huawei-gaokun-ec.c:134:32: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected unsigned char [usertype] *buf @@ got unsigned char const [usertype] *req @@ drivers/platform/arm64/huawei-gaokun-ec.c:134:32: sparse: expected unsigned char [usertype] *buf drivers/platform/arm64/huawei-gaokun-ec.c:134:32: sparse: got unsigned char const [usertype] *req >> drivers/platform/arm64/huawei-gaokun-ec.c:113:20: sparse: sparse: incorrect type in return expression (different modifiers) @@ expected void * @@ got unsigned char const [usertype] * @@ drivers/platform/arm64/huawei-gaokun-ec.c:113:20: sparse: expected void * drivers/platform/arm64/huawei-gaokun-ec.c:113:20: sparse: got unsigned char const [usertype] * vim +134 drivers/platform/arm64/huawei-gaokun-ec.c 110 111 static inline void *extr_resp_shallow(const u8 *src) 112 { > 113 return src + RESP_HDR_SIZE; 114 } 115 116 struct gaokun_ec { 117 struct i2c_client *client; 118 struct mutex lock; /* EC transaction lock */ 119 struct blocking_notifier_head notifier_list; 120 struct device *hwmon_dev; 121 struct input_dev *idev; 122 bool suspended; 123 }; 124 125 static int gaokun_ec_request(struct gaokun_ec *ec, const u8 *req, 126 size_t resp_len, u8 *resp) 127 { 128 struct i2c_client *client = ec->client; 129 struct i2c_msg msgs[] = { 130 { 131 .addr = client->addr, 132 .flags = client->flags, 133 .len = REQ_LEN(req), > 134 .buf = req, 135 }, { 136 .addr = client->addr, 137 .flags = client->flags | I2C_M_RD, 138 .len = resp_len, 139 .buf = resp, 140 }, 141 }; 142 int ret; 143 144 guard(mutex)(&ec->lock); 145 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 146 if (ret != ARRAY_SIZE(msgs)) { 147 dev_err(&client->dev, "I2C transfer error %d\n", ret); 148 goto out_after_break; 149 } 150 151 ret = *resp; 152 if (ret) 153 dev_err(&client->dev, "EC transaction error %d\n", ret); 154 155 out_after_break: 156 usleep_range(2000, 2500); /* have a break, ACPI did this */ 157 158 return ret; 159 } 160 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
