Re: [PATCH] leds: add aw91xxx driver

[kernel test robot <lkp@intel.com>]

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on lee-leds/for-leds-next]
[also build test WARNING on linus/master v6.18-rc6 next-20251118]
[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/429368636-qq-com/leds-add-aw91xxx-driver/20251117-175335
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git for-leds-next
patch link:    https://lore.kernel.org/r/tencent_1B2BC712D34FBE7DEB01320E665BEB2D8908%40qq.com
patch subject: [PATCH] leds: add aw91xxx driver
config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20251119/202511190823.KypHuQek-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511190823.KypHuQek-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511190823.KypHuQek-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/leds/leds-aw91xxx.c:653:23: warning: more '%' conversions than data arguments [-Wformat-insufficient-args]
     653 |         if (sscanf(buf, "%x %x", &databuf[0]) == 1)
         |                             ~^
>> drivers/leds/leds-aw91xxx.c:1309:13: warning: no previous prototype for function 'aw91xxx_irq_func' [-Wmissing-prototypes]
    1309 | irqreturn_t aw91xxx_irq_func(int irq, void *key_data)
         |             ^
   drivers/leds/leds-aw91xxx.c:1309:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1309 | irqreturn_t aw91xxx_irq_func(int irq, void *key_data)
         | ^
         | static 
>> drivers/leds/leds-aw91xxx.c:1395:6: warning: no previous prototype for function 'aw91xxx_int_work' [-Wmissing-prototypes]
    1395 | void aw91xxx_int_work(struct work_struct *work)
         |      ^
   drivers/leds/leds-aw91xxx.c:1395:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1395 | void aw91xxx_int_work(struct work_struct *work)
         | ^
         | static 
   drivers/leds/leds-aw91xxx.c:1425:6: warning: variable 'key_num' set but not used [-Wunused-but-set-variable]
    1425 |         int key_num = 0;
         |             ^
   4 warnings generated.


vim +653 drivers/leds/leds-aw91xxx.c

   645	
   646	static ssize_t
   647	blink_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
   648	{
   649		unsigned int databuf[2];
   650		struct led_classdev *led_cdev = dev_get_drvdata(dev);
   651		struct aw91xxx *aw91xxx = container_of(led_cdev, struct aw91xxx, cdev);
   652	
 > 653		if (sscanf(buf, "%x %x", &databuf[0]) == 1)
   654			aw91xxx_led_blink(aw91xxx, databuf[0], 3);
   655	
   656		return len;
   657	}
   658	

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