Hi Nam, kernel test robot noticed the following build warnings: [auto build test WARNING on f09079bd04a924c72d555cd97942d5f8d7eca98c] url: https://github.com/intel-lab-lkp/linux/commits/Nam-Tran/dt-bindings-leds-add-TI-National-Semiconductor-LP5812-LED-Driver/20250611-100314 base: f09079bd04a924c72d555cd97942d5f8d7eca98c patch link: https://lore.kernel.org/r/20250610174319.183375-4-trannamatk%40gmail.com patch subject: [PATCH v9 2/4] leds: add TI/National Semiconductor LP5812 LED Driver config: x86_64-randconfig-002-20250617 (https://download.01.org/0day-ci/archive/20250617/202506170238.VtqmOKaK-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250617/202506170238.VtqmOKaK-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/202506170238.VtqmOKaK-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/leds/rgb/leds-lp5812.c: In function 'lp5812_init_led.isra': >> drivers/leds/rgb/leds-lp5812.c:1585:57: warning: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size between 5 and 24 [-Wformat-truncation=] 1585 | snprintf(name, sizeof(name), "%s:channel%d", | ^~ drivers/leds/rgb/leds-lp5812.c:1585:46: note: directive argument in the range [0, 2147483647] 1585 | snprintf(name, sizeof(name), "%s:channel%d", | ^~~~~~~~~~~~~~ drivers/leds/rgb/leds-lp5812.c:1585:17: note: 'snprintf' output between 10 and 38 bytes into a destination of size 32 1585 | snprintf(name, sizeof(name), "%s:channel%d", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1586 | pdata->label ? : chip->i2c_cl->name, chan); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +1585 drivers/leds/rgb/leds-lp5812.c 1572 1573 static int lp5812_init_led(struct lp5812_led *led, struct lp5812_chip *chip, int chan) 1574 { 1575 struct lp5812_data *pdata = chip->pdata; 1576 struct device *dev = &chip->i2c_cl->dev; 1577 struct mc_subled *mc_led_info; 1578 struct led_classdev *led_cdev; 1579 char name[32]; 1580 int i, ret = 0; 1581 1582 if (pdata->led_config[chan].name) { 1583 led->cdev.name = pdata->led_config[chan].name; 1584 } else { > 1585 snprintf(name, sizeof(name), "%s:channel%d", 1586 pdata->label ? : chip->i2c_cl->name, chan); 1587 led->cdev.name = name; 1588 } 1589 1590 if (pdata->led_config[chan].is_sc_led == 0) { 1591 mc_led_info = devm_kcalloc(dev, 1592 pdata->led_config[chan].num_colors, 1593 sizeof(*mc_led_info), GFP_KERNEL); 1594 if (!mc_led_info) 1595 return -ENOMEM; 1596 1597 led_cdev = &led->mc_cdev.led_cdev; 1598 led_cdev->name = led->cdev.name; 1599 led_cdev->brightness_set_blocking = lp5812_set_mc_brightness; 1600 led->mc_cdev.num_colors = pdata->led_config[chan].num_colors; 1601 for (i = 0; i < led->mc_cdev.num_colors; i++) { 1602 mc_led_info[i].color_index = 1603 pdata->led_config[chan].color_id[i]; 1604 mc_led_info[i].channel = 1605 pdata->led_config[chan].led_id[i]; 1606 } 1607 1608 led->mc_cdev.subled_info = mc_led_info; 1609 } else { 1610 led->cdev.brightness_set_blocking = lp5812_set_brightness; 1611 } 1612 1613 led->cdev.groups = lp5812_led_groups; 1614 led->chan_nr = chan; 1615 1616 if (pdata->led_config[chan].is_sc_led) { 1617 ret = devm_led_classdev_register(dev, &led->cdev); 1618 if (ret == 0) { 1619 led->cdev.dev->platform_data = devm_kstrdup(dev, LP5812_SC_LED, GFP_KERNEL); 1620 if (!led->cdev.dev->platform_data) 1621 return -ENOMEM; 1622 } 1623 } else { 1624 ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev); 1625 if (ret == 0) { 1626 led->mc_cdev.led_cdev.dev->platform_data = 1627 devm_kstrdup(dev, LP5812_MC_LED, GFP_KERNEL); 1628 if (!led->mc_cdev.led_cdev.dev->platform_data) 1629 return -ENOMEM; 1630 1631 ret = sysfs_create_groups(&led->mc_cdev.led_cdev.dev->kobj, 1632 lp5812_led_groups); 1633 if (ret) 1634 dev_err(dev, "sysfs_create_groups failed\n"); 1635 } 1636 } 1637 1638 if (ret) { 1639 dev_err(dev, "led register err: %d\n", ret); 1640 return ret; 1641 } 1642 1643 return 0; 1644 } 1645 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
