Re: [PATCH v2 2/8] power: supply: core: allow to constify property lists

From: kbuild test robot
Date: Fri Apr 10 2020 - 16:41:59 EST

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Hi "MichaÅ,

I love your patch! Yet something to improve:

[auto build test ERROR on power-supply/for-next]
[also build test ERROR on hwmon/hwmon-next linus/master v5.6 next-20200410]
[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/Micha-Miros-aw/power-supply-core-extensions-and-fixes/20200405-033553
base: https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next
config: nds32-randconfig-a001-20200410 (attached as .config)
compiler: nds32le-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
GCC_VERSION=9.3.0 make.cross ARCH=nds32

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

drivers/power/supply/generic-adc-battery.c: In function 'gab_probe':
drivers/power/supply/generic-adc-battery.c:280:17: warning: passing argument 1 of 'memcpy' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
280 | memcpy(psy_desc->properties, gab_props, sizeof(gab_props));
| ~~~~~~~~^~~~~~~~~~~~
In file included from include/linux/string.h:20,
from include/linux/bitmap.h:9,
from include/linux/cpumask.h:12,
from include/linux/interrupt.h:8,
from drivers/power/supply/generic-adc-battery.c:12:
arch/nds32/include/asm/string.h:8:14: note: expected 'void *' but argument is of type 'const enum power_supply_property *'
8 | extern void *memcpy(void *, const void *, __kernel_size_t);
| ^~~~~~
>> drivers/power/supply/generic-adc-battery.c:302:35: error: assignment of read-only location '*(psy_desc->properties + (sizetype)((unsigned int)index++ * 4))'
302 | psy_desc->properties[index++] =
| ^

vim +302 drivers/power/supply/generic-adc-battery.c

e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 237
c8afa6406e60ae drivers/power/generic-adc-battery.c Bill Pemberton 2012-11-19 238 static int gab_probe(struct platform_device *pdev)
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 239 {
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 240 struct gab *adc_bat;
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 241 struct power_supply_desc *psy_desc;
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 242 struct power_supply_config psy_cfg = {};
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 243 struct gab_platform_data *pdata = pdev->dev.platform_data;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 244 int ret = 0;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 245 int chan;
932d47448c3caa drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 246 int index = ARRAY_SIZE(gab_props);
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 247 bool any = false;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 248
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 249 adc_bat = devm_kzalloc(&pdev->dev, sizeof(*adc_bat), GFP_KERNEL);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 250 if (!adc_bat) {
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 251 dev_err(&pdev->dev, "failed to allocate memory\n");
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 252 return -ENOMEM;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 253 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 254
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 255 psy_cfg.drv_data = adc_bat;
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 256 psy_desc = &adc_bat->psy_desc;
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 257 psy_desc->name = pdata->battery_info.name;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 258
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 259 /* bootup default values for the battery */
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 260 adc_bat->cable_plugged = false;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 261 adc_bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 262 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 263 psy_desc->get_property = gab_get_property;
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 264 psy_desc->external_power_changed = gab_ext_power_changed;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 265 adc_bat->pdata = pdata;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 266
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 267 /*
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 268 * copying the static properties and allocating extra memory for holding
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 269 * the extra configurable properties received from platform data.
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 270 */
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 271 psy_desc->properties = kcalloc(ARRAY_SIZE(gab_props) +
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 272 ARRAY_SIZE(gab_chan_name),
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 273 sizeof(*psy_desc->properties),
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 274 GFP_KERNEL);
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 275 if (!psy_desc->properties) {
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 276 ret = -ENOMEM;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 277 goto first_mem_fail;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 278 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 279
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 280 memcpy(psy_desc->properties, gab_props, sizeof(gab_props));
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 281
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 282 /*
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 283 * getting channel from iio and copying the battery properties
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 284 * based on the channel supported by consumer device.
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 285 */
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 286 for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
5aa57f0a655276 drivers/power/generic-adc-battery.c Guenter Roeck 2013-02-04 287 adc_bat->channel[chan] = iio_channel_get(&pdev->dev,
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 288 gab_chan_name[chan]);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 289 if (IS_ERR(adc_bat->channel[chan])) {
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 290 ret = PTR_ERR(adc_bat->channel[chan]);
64d26f225fefe0 drivers/power/generic-adc-battery.c Dan Carpenter 2013-02-14 291 adc_bat->channel[chan] = NULL;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 292 } else {
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 293 /* copying properties for supported channels only */
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 294 int index2;
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 295
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 296 for (index2 = 0; index2 < index; index2++) {
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 297 if (psy_desc->properties[index2] ==
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 298 gab_dyn_props[chan])
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 299 break; /* already known */
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 300 }
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 301 if (index2 == index) /* really new */
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 @302 psy_desc->properties[index++] =
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 303 gab_dyn_props[chan];
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 304 any = true;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 305 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 306 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 307
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 308 /* none of the channels are supported so let's bail out */
a427503edaaed9 drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 309 if (!any) {
d211c6e82435df drivers/power/generic-adc-battery.c Axel Lin 2013-05-25 310 ret = -ENODEV;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 311 goto second_mem_fail;
d211c6e82435df drivers/power/generic-adc-battery.c Axel Lin 2013-05-25 312 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 313
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 314 /*
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 315 * Total number of properties is equal to static properties
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 316 * plus the dynamic properties.Some properties may not be set
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 317 * as come channels may be not be supported by the device.So
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 318 * we need to take care of that.
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 319 */
932d47448c3caa drivers/power/supply/generic-adc-battery.c H. Nikolaus Schaller 2018-06-26 320 psy_desc->num_properties = index;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 321
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 322 adc_bat->psy = power_supply_register(&pdev->dev, psy_desc, &psy_cfg);
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 323 if (IS_ERR(adc_bat->psy)) {
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 324 ret = PTR_ERR(adc_bat->psy);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 325 goto err_reg_fail;
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 326 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 327
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 328 INIT_DELAYED_WORK(&adc_bat->bat_work, gab_work);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 329
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 330 if (gpio_is_valid(pdata->gpio_charge_finished)) {
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 331 int irq;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 332 ret = gpio_request(pdata->gpio_charge_finished, "charged");
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 333 if (ret)
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 334 goto gpio_req_fail;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 335
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 336 irq = gpio_to_irq(pdata->gpio_charge_finished);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 337 ret = request_any_context_irq(irq, gab_charged,
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 338 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 339 "battery charged", adc_bat);
a5af092245a339 drivers/power/generic-adc-battery.c Axel Lin 2012-11-16 340 if (ret < 0)
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 341 goto err_gpio;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 342 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 343
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 344 platform_set_drvdata(pdev, adc_bat);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 345
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 346 /* Schedule timer to check current status */
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 347 schedule_delayed_work(&adc_bat->bat_work,
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 348 msecs_to_jiffies(0));
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 349 return 0;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 350
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 351 err_gpio:
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 352 gpio_free(pdata->gpio_charge_finished);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 353 gpio_req_fail:
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 354 power_supply_unregister(adc_bat->psy);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 355 err_reg_fail:
64d26f225fefe0 drivers/power/generic-adc-battery.c Dan Carpenter 2013-02-14 356 for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
64d26f225fefe0 drivers/power/generic-adc-battery.c Dan Carpenter 2013-02-14 357 if (adc_bat->channel[chan])
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 358 iio_channel_release(adc_bat->channel[chan]);
64d26f225fefe0 drivers/power/generic-adc-battery.c Dan Carpenter 2013-02-14 359 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 360 second_mem_fail:
297d716f6260cc drivers/power/generic-adc-battery.c Krzysztof Kozlowski 2015-03-12 361 kfree(psy_desc->properties);
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 362 first_mem_fail:
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 363 return ret;
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 364 }
e60fea794e6ecb drivers/power/generic-adc-battery.c anish kumar 2012-09-21 365

:::::: The code at line 302 was first introduced by commit
:::::: a427503edaaed9b75ed9746a654cece7e93e60a8 power: generic-adc-battery: check for duplicate properties copied from iio channels

:::::: TO: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
:::::: CC: Sebastian Reichel <sre@xxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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