Hi Kai-Heng, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.7-rc6 next-20200515] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Kai-Heng-Feng/HID-i2c-hid-Enable... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b9bbe6ed63b2b9f2c9ee5cbd0f2c946a2723f4ce config: parisc-randconfig-r031-20200518 (attached as .config) compiler: hppa64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/module.h:12, from drivers/hid/i2c-hid/i2c-hid-core.c:21: drivers/hid/i2c-hid/i2c-hid-core.c: In function 'i2c_hid_probe': 1075 | if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) { | ^~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 1075 | if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) { | ^~ drivers/hid/i2c-hid/i2c-hid-core.c:1075:6: note: each undeclared identifier is reported only once for each function it appears in 1075 | if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) { | ^~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 1075 | if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) { | ^~ vim +/acpi_gbl_FADT +1075 drivers/hid/i2c-hid/i2c-hid-core.c 995 996 static int i2c_hid_probe(struct i2c_client *client, 997 const struct i2c_device_id *dev_id) 998 { 999 int ret; 1000 struct i2c_hid *ihid; 1001 struct hid_device *hid; 1002 __u16 hidRegister; 1003 struct i2c_hid_platform_data *platform_data = client->dev.platform_data; 1004 1005 dbg_hid("HID probe called for i2c 0x%02x\n", client->addr); 1006 1007 if (!client->irq) { 1008 dev_err(&client->dev, 1009 "HID over i2c has not been provided an Int IRQ\n"); 1010 return -EINVAL; 1011 } 1012 1013 if (client->irq < 0) { 1014 if (client->irq != -EPROBE_DEFER) 1015 dev_err(&client->dev, 1016 "HID over i2c doesn't have a valid IRQ\n"); 1017 return client->irq; 1018 } 1019 1020 ihid = devm_kzalloc(&client->dev, sizeof(*ihid), GFP_KERNEL); 1021 if (!ihid) 1022 return -ENOMEM; 1023 1024 if (client->dev.of_node) { 1025 ret = i2c_hid_of_probe(client, &ihid->pdata); 1026 if (ret) 1027 return ret; 1028 } else if (!platform_data) { 1029 ret = i2c_hid_acpi_pdata(client, &ihid->pdata); 1030 if (ret) 1031 return ret; 1032 } else { 1033 ihid->pdata = *platform_data; 1034 } 1035 1036 /* Parse platform agnostic common properties from ACPI / device tree */ 1037 i2c_hid_fwnode_probe(client, &ihid->pdata); 1038 1039 ihid->pdata.supplies[0].supply = "vdd"; 1040 ihid->pdata.supplies[1].supply = "vddl"; 1041 1042 ret = devm_regulator_bulk_get(&client->dev, 1043 ARRAY_SIZE(ihid->pdata.supplies), 1044 ihid->pdata.supplies); 1045 if (ret) 1046 return ret; 1047 1048 ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies), 1049 ihid->pdata.supplies); 1050 if (ret < 0) 1051 return ret; 1052 1053 if (ihid->pdata.post_power_delay_ms) 1054 msleep(ihid->pdata.post_power_delay_ms); 1055 1056 i2c_set_clientdata(client, ihid); 1057 1058 ihid->client = client; 1059 1060 hidRegister = ihid->pdata.hid_descriptor_address; 1061 ihid->wHIDDescRegister = cpu_to_le16(hidRegister); 1062 1063 init_waitqueue_head(&ihid->wait); 1064 mutex_init(&ihid->reset_lock); 1065 1066 /* we need to allocate the command buffer without knowing the maximum 1067 * size of the reports. Let's use HID_MIN_BUFFER_SIZE, then we do the 1068 * real computation later. */ 1069 ret = i2c_hid_alloc_buffers(ihid, HID_MIN_BUFFER_SIZE); 1070 if (ret < 0) 1071 goto err_regulator; 1072 1073 i2c_hid_acpi_fix_up_power(&client->dev); 1074 1076 device_set_wakeup_capable(&client->dev, true); 1077 device_wakeup_enable(&client->dev); 1078 } 1079 1080 device_enable_async_suspend(&client->dev); 1081 1082 /* Make sure there is something at this address */ 1083 ret = i2c_smbus_read_byte(client); 1084 if (ret < 0) { 1085 dev_dbg(&client->dev, "nothing at this address: %d\n", ret); 1086 ret = -ENXIO; 1087 goto err_regulator; 1088 } 1089 1090 ret = i2c_hid_fetch_hid_descriptor(ihid); 1091 if (ret < 0) 1092 goto err_regulator; 1093 1094 ret = i2c_hid_init_irq(client); 1095 if (ret < 0) 1096 goto err_regulator; 1097 1098 hid = hid_allocate_device(); 1099 if (IS_ERR(hid)) { 1100 ret = PTR_ERR(hid); 1101 goto err_irq; 1102 } 1103 1104 ihid->hid = hid; 1105 1106 hid->driver_data = client; 1107 hid->ll_driver = &i2c_hid_ll_driver; 1108 hid->dev.parent = &client->dev; 1109 hid->bus = BUS_I2C; 1110 hid->version = le16_to_cpu(ihid->hdesc.bcdVersion); 1111 hid->vendor = le16_to_cpu(ihid->hdesc.wVendorID); 1112 hid->product = le16_to_cpu(ihid->hdesc.wProductID); 1113 1114 snprintf(hid->name, sizeof(hid->name), "%s %04hX:%04hX", 1115 client->name, hid->vendor, hid->product); 1116 strlcpy(hid->phys, dev_name(&client->dev), sizeof(hid->phys)); 1117 1118 ihid->quirks = i2c_hid_lookup_quirk(hid->vendor, hid->product); 1119 1120 ret = hid_add_device(hid); 1121 if (ret) { 1122 if (ret != -ENODEV) 1123 hid_err(client, "can't add hid device: %d\n", ret); 1124 goto err_mem_free; 1125 } 1126 1127 return 0; 1128 1129 err_mem_free: 1130 hid_destroy_device(hid); 1131 1132 err_irq: 1133 free_irq(client->irq, ihid); 1134 1135 err_regulator: 1136 regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies), 1137 ihid->pdata.supplies); 1138 i2c_hid_free_buffers(ihid); 1139 return ret; 1140 } 1141 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org