linux-kernel - Re: [PATCH v10 12/16] leds: lp55xx: Add multicolor framework support to lp55xx

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Date:   Wed, 2 Oct 2019 08:31:10 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Dan Murphy <dmurphy@...com>
Cc:     kbuild-all@...org, jacek.anaszewski@...il.com, pavel@....cz,
        linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dan Murphy <dmurphy@...com>
Subject: Re: [PATCH v10 12/16] leds: lp55xx: Add multicolor framework support
 to lp55xx

Hi Dan,

I love your patch! Yet something to improve:

[auto build test ERROR on j.anaszewski-leds/for-next]
[cannot apply to v5.4-rc1 next-20191001]
[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/Dan-Murphy/Multicolor-Framework/20191002-062337
base:   https://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds.git for-next
config: x86_64-randconfig-f004-201939 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-13) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   ld: drivers/leds/leds-lp55xx-common.o: in function `lp55xx_set_brightness':
>> drivers/leds/leds-lp55xx-common.c:158: undefined reference to `led_mc_calc_brightness'
   ld: drivers/leds/leds-lp55xx-common.o: in function `led_classdev_multicolor_register':
>> include/linux/led-class-multicolor.h:64: undefined reference to `led_classdev_multicolor_register_ext'

vim +158 drivers/leds/leds-lp55xx-common.c

   147	
   148	static int lp55xx_set_brightness(struct led_classdev *cdev,
   149				     enum led_brightness brightness)
   150	{
   151		struct lp55xx_led *led = cdev_to_lp55xx_led(cdev);
   152		struct lp55xx_device_config *cfg = led->chip->cfg;
   153		int channel_num;
   154		int ret;
   155		int i;
   156	
   157		if (led->mc_cdev.num_leds > 1) {
 > 158			led_mc_calc_brightness(&led->mc_cdev, brightness,
   159					       &color_component[0]);
   160	
   161			for (i = 0; i < led->mc_cdev.num_leds; i++) {
   162				channel_num = lp55xx_get_channel(led,
   163							color_component[i].color_id);
   164				if (channel_num < 0)
   165					return channel_num;
   166	
   167				ret = cfg->color_intensity_fn(led, channel_num,
   168							 color_component[i].brightness);
   169				if (ret)
   170					return ret;
   171			}
   172		} else {
   173			led->brightness = (u8)brightness;
   174			ret = cfg->brightness_fn(led);
   175		}
   176	
   177		return ret;
   178	}
   179	

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