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Date: Tue, 24 Nov 2020 09:19:14 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Dan Murphy <dmurphy@...com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Pavel Machek <pavel@....cz>
Subject: drivers/leds/leds-lp55xx-common.c:204:4: warning: Variable 'j' is
modified but its new value is never used.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 418baf2c28f3473039f2f7377760bd8f6897ae18
commit: 92a81562e695628086acb92f95090ab09d9b9ec0 leds: lp55xx: Add multicolor framework support to lp55xx
compiler: c6x-elf-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <rong.a.chen@...el.com>
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
>> drivers/leds/leds-lp55xx-common.c:204:4: warning: Variable 'j' is modified but its new value is never used. [unreadVariable]
j++;
^
vim +/j +204 drivers/leds/leds-lp55xx-common.c
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 158)
9e9b3db1b2f725b Milo(Woogyom Kim 2013-02-05 159) static int lp55xx_init_led(struct lp55xx_led *led,
9e9b3db1b2f725b Milo(Woogyom Kim 2013-02-05 160) struct lp55xx_chip *chip, int chan)
9e9b3db1b2f725b Milo(Woogyom Kim 2013-02-05 161) {
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 162) struct lp55xx_platform_data *pdata = chip->pdata;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 163) struct lp55xx_device_config *cfg = chip->cfg;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 164) struct device *dev = &chip->cl->dev;
92a81562e695628 Dan Murphy 2020-07-16 165 int max_channel = cfg->max_channel;
92a81562e695628 Dan Murphy 2020-07-16 166 struct mc_subled *mc_led_info;
92a81562e695628 Dan Murphy 2020-07-16 167 struct led_classdev *led_cdev;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 168) char name[32];
92a81562e695628 Dan Murphy 2020-07-16 169 int i, j = 0;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 170) int ret;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 171)
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 172) if (chan >= max_channel) {
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 173) dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel);
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 174) return -EINVAL;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 175) }
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 176)
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 177) if (pdata->led_config[chan].led_current == 0)
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 178) return 0;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 179)
92a81562e695628 Dan Murphy 2020-07-16 180 if (pdata->led_config[chan].name) {
92a81562e695628 Dan Murphy 2020-07-16 181 led->cdev.name = pdata->led_config[chan].name;
92a81562e695628 Dan Murphy 2020-07-16 182 } else {
92a81562e695628 Dan Murphy 2020-07-16 183 snprintf(name, sizeof(name), "%s:channel%d",
92a81562e695628 Dan Murphy 2020-07-16 184 pdata->label ? : chip->cl->name, chan);
92a81562e695628 Dan Murphy 2020-07-16 185 led->cdev.name = name;
92a81562e695628 Dan Murphy 2020-07-16 186 }
92a81562e695628 Dan Murphy 2020-07-16 187
92a81562e695628 Dan Murphy 2020-07-16 188 if (pdata->led_config[chan].num_colors > 1) {
92a81562e695628 Dan Murphy 2020-07-16 189 mc_led_info = devm_kcalloc(dev,
92a81562e695628 Dan Murphy 2020-07-16 190 pdata->led_config[chan].num_colors,
92a81562e695628 Dan Murphy 2020-07-16 191 sizeof(*mc_led_info), GFP_KERNEL);
92a81562e695628 Dan Murphy 2020-07-16 192 if (!mc_led_info)
92a81562e695628 Dan Murphy 2020-07-16 193 return -ENOMEM;
92a81562e695628 Dan Murphy 2020-07-16 194
92a81562e695628 Dan Murphy 2020-07-16 195 led_cdev = &led->mc_cdev.led_cdev;
92a81562e695628 Dan Murphy 2020-07-16 196 led_cdev->name = led->cdev.name;
92a81562e695628 Dan Murphy 2020-07-16 197 led_cdev->brightness_set_blocking = lp55xx_set_mc_brightness;
92a81562e695628 Dan Murphy 2020-07-16 198 led->mc_cdev.num_colors = pdata->led_config[chan].num_colors;
92a81562e695628 Dan Murphy 2020-07-16 199 for (i = 0; i < led->mc_cdev.num_colors; i++) {
92a81562e695628 Dan Murphy 2020-07-16 200 mc_led_info[i].color_index =
92a81562e695628 Dan Murphy 2020-07-16 201 pdata->led_config[chan].color_id[i];
92a81562e695628 Dan Murphy 2020-07-16 202 mc_led_info[i].channel =
92a81562e695628 Dan Murphy 2020-07-16 203 pdata->led_config[chan].output_num[i];
92a81562e695628 Dan Murphy 2020-07-16 @204 j++;
92a81562e695628 Dan Murphy 2020-07-16 205 }
92a81562e695628 Dan Murphy 2020-07-16 206
92a81562e695628 Dan Murphy 2020-07-16 207 led->mc_cdev.subled_info = mc_led_info;
92a81562e695628 Dan Murphy 2020-07-16 208 } else {
92a81562e695628 Dan Murphy 2020-07-16 209 led->cdev.brightness_set_blocking = lp55xx_set_brightness;
92a81562e695628 Dan Murphy 2020-07-16 210 }
92a81562e695628 Dan Murphy 2020-07-16 211
92a81562e695628 Dan Murphy 2020-07-16 212 led->cdev.groups = lp55xx_led_groups;
92a81562e695628 Dan Murphy 2020-07-16 213 led->cdev.default_trigger = pdata->led_config[chan].default_trigger;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 214) led->led_current = pdata->led_config[chan].led_current;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 215) led->max_current = pdata->led_config[chan].max_current;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 216) led->chan_nr = pdata->led_config[chan].chan_nr;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 217)
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 218) if (led->chan_nr >= max_channel) {
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 219) dev_err(dev, "Use channel numbers between 0 and %d\n",
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 220) max_channel - 1);
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 221) return -EINVAL;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 222) }
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 223)
92a81562e695628 Dan Murphy 2020-07-16 224 if (pdata->led_config[chan].num_colors > 1)
92a81562e695628 Dan Murphy 2020-07-16 225 ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev);
92a81562e695628 Dan Murphy 2020-07-16 226 else
c732eaf01f9c213 Dan Murphy 2020-07-16 227 ret = devm_led_classdev_register(dev, &led->cdev);
92a81562e695628 Dan Murphy 2020-07-16 228
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 229) if (ret) {
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 230) dev_err(dev, "led register err: %d\n", ret);
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 231) return ret;
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 232) }
0e2023463a3c941 Milo(Woogyom Kim 2013-02-05 233)
9e9b3db1b2f725b Milo(Woogyom Kim 2013-02-05 234) return 0;
9e9b3db1b2f725b Milo(Woogyom Kim 2013-02-05 235) }
9e9b3db1b2f725b Milo(Woogyom Kim 2013-02-05 236)
---
0-DAY CI Kernel Test Service, Intel Corporation
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