Re: [PATCH v2 2/2] gpio: gpio-adg1414: New driver

[kernel test robot <lkp@xxxxxxxxx>]

Hi Kim,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 4dc1d1bec89864d8076e5ab314f86f46442bfb02]

url:    https://github.com/intel-lab-lkp/linux/commits/Kim-Seer-Paller/dt-bindings-gpio-add-adg1414/20250213-211900
base:   4dc1d1bec89864d8076e5ab314f86f46442bfb02
patch link:    https://lore.kernel.org/r/20250213-for_upstream-v2-2-ec4eff3b3cd5%40analog.com
patch subject: [PATCH v2 2/2] gpio: gpio-adg1414: New driver
config: alpha-randconfig-r132-20250215 (https://download.01.org/0day-ci/archive/20250215/202502150933.vtaQAJRw-lkp@xxxxxxxxx/config)
compiler: alpha-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20250215/202502150933.vtaQAJRw-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/202502150933.vtaQAJRw-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpio/gpio-adg1414.c:68:31: sparse: sparse: Using plain integer as NULL pointer
   drivers/gpio/gpio-adg1414.c: note: in included file (through include/linux/smp.h, include/linux/lockdep.h, include/linux/spinlock.h, ...):
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true

vim +68 drivers/gpio/gpio-adg1414.c

    54	
    55	static void adg1414_set(struct gpio_chip *chip, unsigned int offset, int value)
    56	{
    57		struct adg1414_state *st = gpiochip_get_data(chip);
    58	
    59		guard(mutex)(&st->lock);
    60	
    61		if (value)
    62			st->buf |= BIT(offset);
    63		else
    64			st->buf &= ~BIT(offset);
    65	
    66		st->tx = cpu_to_be32(st->buf << (32 - st->chip.ngpio));
    67	
  > 68		adg1414_spi_write(st, 0, st->chip.ngpio / 8);
    69	}
    70	

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