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Date: Mon, 10 Jun 2024 14:13:53 +0800
From: kernel test robot <lkp@...el.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
linux-input@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Artur Rojek <contact@...ur-rojek.eu>,
Chris Morgan <macromorgan@...mail.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: adc-joystick - move axes data into the main
structure
Hi Dmitry,
kernel test robot noticed the following build warnings:
[auto build test WARNING on dtor-input/next]
[cannot apply to dtor-input/for-linus hid/for-next linus/master v6.10-rc3 next-20240607]
[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/Dmitry-Torokhov/Input-adc-joystick-move-axes-data-into-the-main-structure/20240610-060124
base: https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
patch link: https://lore.kernel.org/r/ZmYlfKDm5sgB44EU%40google.com
patch subject: [PATCH] Input: adc-joystick - move axes data into the main structure
config: i386-buildonly-randconfig-006-20240610 (https://download.01.org/0day-ci/archive/20240610/202406101440.sNrwqJte-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240610/202406101440.sNrwqJte-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406101440.sNrwqJte-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/input/joystick/adc-joystick.c:166:9: warning: variable 'axes' is uninitialized when used here [-Wuninitialized]
166 | &axes[i].code);
| ^~~~
drivers/input/joystick/adc-joystick.c:134:32: note: initialize the variable 'axes' to silence this warning
134 | struct adc_joystick_axis *axes;
| ^
| = NULL
>> drivers/input/joystick/adc-joystick.c:241:19: warning: variable 'joy' is uninitialized when used here [-Wuninitialized]
241 | error = PTR_ERR(joy->chans);
| ^~~
drivers/input/joystick/adc-joystick.c:233:26: note: initialize the variable 'joy' to silence this warning
233 | struct adc_joystick *joy;
| ^
| = NULL
2 warnings generated.
vim +/axes +166 drivers/input/joystick/adc-joystick.c
2c2b364fddd551 Artur Rojek 2020-09-28 131
2c2b364fddd551 Artur Rojek 2020-09-28 132 static int adc_joystick_set_axes(struct device *dev, struct adc_joystick *joy)
2c2b364fddd551 Artur Rojek 2020-09-28 133 {
2c2b364fddd551 Artur Rojek 2020-09-28 134 struct adc_joystick_axis *axes;
2c2b364fddd551 Artur Rojek 2020-09-28 135 struct fwnode_handle *child;
815b74328f141f Dmitry Torokhov 2024-06-09 136 s32 range[2], fuzz, flat;
815b74328f141f Dmitry Torokhov 2024-06-09 137 unsigned int num_axes;
815b74328f141f Dmitry Torokhov 2024-06-09 138 int error, i;
2c2b364fddd551 Artur Rojek 2020-09-28 139
2c2b364fddd551 Artur Rojek 2020-09-28 140 num_axes = device_get_child_node_count(dev);
2c2b364fddd551 Artur Rojek 2020-09-28 141 if (!num_axes) {
2c2b364fddd551 Artur Rojek 2020-09-28 142 dev_err(dev, "Unable to find child nodes\n");
2c2b364fddd551 Artur Rojek 2020-09-28 143 return -EINVAL;
2c2b364fddd551 Artur Rojek 2020-09-28 144 }
2c2b364fddd551 Artur Rojek 2020-09-28 145
2c2b364fddd551 Artur Rojek 2020-09-28 146 if (num_axes != joy->num_chans) {
2c2b364fddd551 Artur Rojek 2020-09-28 147 dev_err(dev, "Got %d child nodes for %d channels\n",
2c2b364fddd551 Artur Rojek 2020-09-28 148 num_axes, joy->num_chans);
2c2b364fddd551 Artur Rojek 2020-09-28 149 return -EINVAL;
2c2b364fddd551 Artur Rojek 2020-09-28 150 }
2c2b364fddd551 Artur Rojek 2020-09-28 151
2c2b364fddd551 Artur Rojek 2020-09-28 152 device_for_each_child_node(dev, child) {
2c2b364fddd551 Artur Rojek 2020-09-28 153 error = fwnode_property_read_u32(child, "reg", &i);
2c2b364fddd551 Artur Rojek 2020-09-28 154 if (error) {
2c2b364fddd551 Artur Rojek 2020-09-28 155 dev_err(dev, "reg invalid or missing\n");
2c2b364fddd551 Artur Rojek 2020-09-28 156 goto err_fwnode_put;
2c2b364fddd551 Artur Rojek 2020-09-28 157 }
2c2b364fddd551 Artur Rojek 2020-09-28 158
2c2b364fddd551 Artur Rojek 2020-09-28 159 if (i >= num_axes) {
2c2b364fddd551 Artur Rojek 2020-09-28 160 error = -EINVAL;
2c2b364fddd551 Artur Rojek 2020-09-28 161 dev_err(dev, "No matching axis for reg %d\n", i);
2c2b364fddd551 Artur Rojek 2020-09-28 162 goto err_fwnode_put;
2c2b364fddd551 Artur Rojek 2020-09-28 163 }
2c2b364fddd551 Artur Rojek 2020-09-28 164
2c2b364fddd551 Artur Rojek 2020-09-28 165 error = fwnode_property_read_u32(child, "linux,code",
2c2b364fddd551 Artur Rojek 2020-09-28 @166 &axes[i].code);
2c2b364fddd551 Artur Rojek 2020-09-28 167 if (error) {
2c2b364fddd551 Artur Rojek 2020-09-28 168 dev_err(dev, "linux,code invalid or missing\n");
2c2b364fddd551 Artur Rojek 2020-09-28 169 goto err_fwnode_put;
2c2b364fddd551 Artur Rojek 2020-09-28 170 }
2c2b364fddd551 Artur Rojek 2020-09-28 171
2c2b364fddd551 Artur Rojek 2020-09-28 172 error = fwnode_property_read_u32_array(child, "abs-range",
815b74328f141f Dmitry Torokhov 2024-06-09 173 range, 2);
2c2b364fddd551 Artur Rojek 2020-09-28 174 if (error) {
2c2b364fddd551 Artur Rojek 2020-09-28 175 dev_err(dev, "abs-range invalid or missing\n");
2c2b364fddd551 Artur Rojek 2020-09-28 176 goto err_fwnode_put;
2c2b364fddd551 Artur Rojek 2020-09-28 177 }
2c2b364fddd551 Artur Rojek 2020-09-28 178
815b74328f141f Dmitry Torokhov 2024-06-09 179 if (range[0] > range[1]) {
6560cfcfb46511 Chris Morgan 2024-01-19 180 dev_dbg(dev, "abs-axis %d inverted\n", i);
6560cfcfb46511 Chris Morgan 2024-01-19 181 axes[i].inverted = true;
815b74328f141f Dmitry Torokhov 2024-06-09 182 swap(range[0], range[1]);
6560cfcfb46511 Chris Morgan 2024-01-19 183 }
6560cfcfb46511 Chris Morgan 2024-01-19 184
815b74328f141f Dmitry Torokhov 2024-06-09 185 fwnode_property_read_u32(child, "abs-fuzz", &fuzz);
815b74328f141f Dmitry Torokhov 2024-06-09 186 fwnode_property_read_u32(child, "abs-flat", &flat);
2c2b364fddd551 Artur Rojek 2020-09-28 187
2c2b364fddd551 Artur Rojek 2020-09-28 188 input_set_abs_params(joy->input, axes[i].code,
815b74328f141f Dmitry Torokhov 2024-06-09 189 range[0], range[1], fuzz, flat);
2c2b364fddd551 Artur Rojek 2020-09-28 190 }
2c2b364fddd551 Artur Rojek 2020-09-28 191
2c2b364fddd551 Artur Rojek 2020-09-28 192 return 0;
2c2b364fddd551 Artur Rojek 2020-09-28 193
2c2b364fddd551 Artur Rojek 2020-09-28 194 err_fwnode_put:
2c2b364fddd551 Artur Rojek 2020-09-28 195 fwnode_handle_put(child);
2c2b364fddd551 Artur Rojek 2020-09-28 196 return error;
2c2b364fddd551 Artur Rojek 2020-09-28 197 }
2c2b364fddd551 Artur Rojek 2020-09-28 198
815b74328f141f Dmitry Torokhov 2024-06-09 199
815b74328f141f Dmitry Torokhov 2024-06-09 200 /*
815b74328f141f Dmitry Torokhov 2024-06-09 201 * Count how many channels we got. NULL terminated.
815b74328f141f Dmitry Torokhov 2024-06-09 202 * Do not check the storage size if using polling.
815b74328f141f Dmitry Torokhov 2024-06-09 203 */
815b74328f141f Dmitry Torokhov 2024-06-09 204 static int adc_joystick_count_channels(struct device *dev,
815b74328f141f Dmitry Torokhov 2024-06-09 205 const struct iio_channel *chans,
815b74328f141f Dmitry Torokhov 2024-06-09 206 bool polled,
815b74328f141f Dmitry Torokhov 2024-06-09 207 unsigned int *num_chans)
815b74328f141f Dmitry Torokhov 2024-06-09 208 {
815b74328f141f Dmitry Torokhov 2024-06-09 209 int bits;
815b74328f141f Dmitry Torokhov 2024-06-09 210 int i;
815b74328f141f Dmitry Torokhov 2024-06-09 211
815b74328f141f Dmitry Torokhov 2024-06-09 212 for (i = 0; chans[i].indio_dev; i++) {
815b74328f141f Dmitry Torokhov 2024-06-09 213 if (polled)
815b74328f141f Dmitry Torokhov 2024-06-09 214 continue;
815b74328f141f Dmitry Torokhov 2024-06-09 215 bits = chans[i].channel->scan_type.storagebits;
815b74328f141f Dmitry Torokhov 2024-06-09 216 if (!bits || bits > 16) {
815b74328f141f Dmitry Torokhov 2024-06-09 217 dev_err(dev, "Unsupported channel storage size\n");
815b74328f141f Dmitry Torokhov 2024-06-09 218 return -EINVAL;
815b74328f141f Dmitry Torokhov 2024-06-09 219 }
815b74328f141f Dmitry Torokhov 2024-06-09 220 if (bits != chans[0].channel->scan_type.storagebits) {
815b74328f141f Dmitry Torokhov 2024-06-09 221 dev_err(dev, "Channels must have equal storage size\n");
815b74328f141f Dmitry Torokhov 2024-06-09 222 return -EINVAL;
815b74328f141f Dmitry Torokhov 2024-06-09 223 }
815b74328f141f Dmitry Torokhov 2024-06-09 224 }
815b74328f141f Dmitry Torokhov 2024-06-09 225
815b74328f141f Dmitry Torokhov 2024-06-09 226 return i;
815b74328f141f Dmitry Torokhov 2024-06-09 227 }
815b74328f141f Dmitry Torokhov 2024-06-09 228
2c2b364fddd551 Artur Rojek 2020-09-28 229 static int adc_joystick_probe(struct platform_device *pdev)
2c2b364fddd551 Artur Rojek 2020-09-28 230 {
2c2b364fddd551 Artur Rojek 2020-09-28 231 struct device *dev = &pdev->dev;
815b74328f141f Dmitry Torokhov 2024-06-09 232 struct iio_channel *chans;
2c2b364fddd551 Artur Rojek 2020-09-28 233 struct adc_joystick *joy;
2c2b364fddd551 Artur Rojek 2020-09-28 234 struct input_dev *input;
815b74328f141f Dmitry Torokhov 2024-06-09 235 unsigned int poll_interval = 0;
815b74328f141f Dmitry Torokhov 2024-06-09 236 unsigned int num_chans;
2c2b364fddd551 Artur Rojek 2020-09-28 237 int error;
2c2b364fddd551 Artur Rojek 2020-09-28 238
815b74328f141f Dmitry Torokhov 2024-06-09 239 chans = devm_iio_channel_get_all(dev);
815b74328f141f Dmitry Torokhov 2024-06-09 240 if (IS_ERR(chans)) {
2c2b364fddd551 Artur Rojek 2020-09-28 @241 error = PTR_ERR(joy->chans);
2c2b364fddd551 Artur Rojek 2020-09-28 242 if (error != -EPROBE_DEFER)
2c2b364fddd551 Artur Rojek 2020-09-28 243 dev_err(dev, "Unable to get IIO channels");
2c2b364fddd551 Artur Rojek 2020-09-28 244 return error;
2c2b364fddd551 Artur Rojek 2020-09-28 245 }
2c2b364fddd551 Artur Rojek 2020-09-28 246
24c06e000e8fa2 Chris Morgan 2022-08-16 247 error = device_property_read_u32(dev, "poll-interval", &poll_interval);
24c06e000e8fa2 Chris Morgan 2022-08-16 248 if (error) {
24c06e000e8fa2 Chris Morgan 2022-08-16 249 /* -EINVAL means the property is absent. */
24c06e000e8fa2 Chris Morgan 2022-08-16 250 if (error != -EINVAL)
24c06e000e8fa2 Chris Morgan 2022-08-16 251 return error;
24c06e000e8fa2 Chris Morgan 2022-08-16 252 } else if (poll_interval == 0) {
24c06e000e8fa2 Chris Morgan 2022-08-16 253 dev_err(dev, "Unable to get poll-interval\n");
24c06e000e8fa2 Chris Morgan 2022-08-16 254 return -EINVAL;
24c06e000e8fa2 Chris Morgan 2022-08-16 255 }
24c06e000e8fa2 Chris Morgan 2022-08-16 256
815b74328f141f Dmitry Torokhov 2024-06-09 257 error = adc_joystick_count_channels(dev, chans, poll_interval != 0,
815b74328f141f Dmitry Torokhov 2024-06-09 258 &num_chans);
815b74328f141f Dmitry Torokhov 2024-06-09 259 if (error)
815b74328f141f Dmitry Torokhov 2024-06-09 260 return error;
815b74328f141f Dmitry Torokhov 2024-06-09 261
815b74328f141f Dmitry Torokhov 2024-06-09 262 joy = devm_kzalloc(dev, struct_size(joy, axes, num_chans), GFP_KERNEL);
815b74328f141f Dmitry Torokhov 2024-06-09 263 if (!joy)
815b74328f141f Dmitry Torokhov 2024-06-09 264 return -ENOMEM;
815b74328f141f Dmitry Torokhov 2024-06-09 265
815b74328f141f Dmitry Torokhov 2024-06-09 266 joy->chans = chans;
815b74328f141f Dmitry Torokhov 2024-06-09 267 joy->num_chans = num_chans;
2c2b364fddd551 Artur Rojek 2020-09-28 268
2c2b364fddd551 Artur Rojek 2020-09-28 269 input = devm_input_allocate_device(dev);
2c2b364fddd551 Artur Rojek 2020-09-28 270 if (!input) {
2c2b364fddd551 Artur Rojek 2020-09-28 271 dev_err(dev, "Unable to allocate input device\n");
2c2b364fddd551 Artur Rojek 2020-09-28 272 return -ENOMEM;
2c2b364fddd551 Artur Rojek 2020-09-28 273 }
2c2b364fddd551 Artur Rojek 2020-09-28 274
2c2b364fddd551 Artur Rojek 2020-09-28 275 joy->input = input;
2c2b364fddd551 Artur Rojek 2020-09-28 276 input->name = pdev->name;
2c2b364fddd551 Artur Rojek 2020-09-28 277 input->id.bustype = BUS_HOST;
2c2b364fddd551 Artur Rojek 2020-09-28 278
2c2b364fddd551 Artur Rojek 2020-09-28 279 error = adc_joystick_set_axes(dev, joy);
2c2b364fddd551 Artur Rojek 2020-09-28 280 if (error)
2c2b364fddd551 Artur Rojek 2020-09-28 281 return error;
2c2b364fddd551 Artur Rojek 2020-09-28 282
815b74328f141f Dmitry Torokhov 2024-06-09 283 if (poll_interval != 0) {
24c06e000e8fa2 Chris Morgan 2022-08-16 284 input_setup_polling(input, adc_joystick_poll);
24c06e000e8fa2 Chris Morgan 2022-08-16 285 input_set_poll_interval(input, poll_interval);
24c06e000e8fa2 Chris Morgan 2022-08-16 286 } else {
24c06e000e8fa2 Chris Morgan 2022-08-16 287 input->open = adc_joystick_open;
24c06e000e8fa2 Chris Morgan 2022-08-16 288 input->close = adc_joystick_close;
24c06e000e8fa2 Chris Morgan 2022-08-16 289
24c06e000e8fa2 Chris Morgan 2022-08-16 290 joy->buffer = iio_channel_get_all_cb(dev, adc_joystick_handle,
24c06e000e8fa2 Chris Morgan 2022-08-16 291 joy);
2c2b364fddd551 Artur Rojek 2020-09-28 292 if (IS_ERR(joy->buffer)) {
2c2b364fddd551 Artur Rojek 2020-09-28 293 dev_err(dev, "Unable to allocate callback buffer\n");
2c2b364fddd551 Artur Rojek 2020-09-28 294 return PTR_ERR(joy->buffer);
2c2b364fddd551 Artur Rojek 2020-09-28 295 }
2c2b364fddd551 Artur Rojek 2020-09-28 296
24c06e000e8fa2 Chris Morgan 2022-08-16 297 error = devm_add_action_or_reset(dev, adc_joystick_cleanup,
24c06e000e8fa2 Chris Morgan 2022-08-16 298 joy->buffer);
2c2b364fddd551 Artur Rojek 2020-09-28 299 if (error) {
2c2b364fddd551 Artur Rojek 2020-09-28 300 dev_err(dev, "Unable to add action\n");
2c2b364fddd551 Artur Rojek 2020-09-28 301 return error;
2c2b364fddd551 Artur Rojek 2020-09-28 302 }
24c06e000e8fa2 Chris Morgan 2022-08-16 303 }
2c2b364fddd551 Artur Rojek 2020-09-28 304
7c744d00990ea9 Dmitry Torokhov 2022-08-02 305 input_set_drvdata(input, joy);
7c744d00990ea9 Dmitry Torokhov 2022-08-02 306
7c744d00990ea9 Dmitry Torokhov 2022-08-02 307 error = input_register_device(input);
7c744d00990ea9 Dmitry Torokhov 2022-08-02 308 if (error) {
7c744d00990ea9 Dmitry Torokhov 2022-08-02 309 dev_err(dev, "Unable to register input device\n");
7c744d00990ea9 Dmitry Torokhov 2022-08-02 310 return error;
7c744d00990ea9 Dmitry Torokhov 2022-08-02 311 }
7c744d00990ea9 Dmitry Torokhov 2022-08-02 312
2c2b364fddd551 Artur Rojek 2020-09-28 313 return 0;
2c2b364fddd551 Artur Rojek 2020-09-28 314 }
2c2b364fddd551 Artur Rojek 2020-09-28 315
--
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