Re: [PATCH v1 3/5] Input: gpio_decoder - replace custom loop by gpiod_get_array_value_cansleep()
From: kernel test robot
Date: Thu Nov 13 2025 - 05:49:00 EST
Hi Andy,
kernel test robot noticed the following build errors:
[auto build test ERROR on dtor-input/next]
[also build test ERROR on dtor-input/for-linus hid/for-next linus/master v6.18-rc5 next-20251113]
[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/Andy-Shevchenko/Input-gpio_decoder-make-use-of-device-properties/20251113-032111
base: https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
patch link: https://lore.kernel.org/r/20251112191412.2088105-4-andriy.shevchenko%40linux.intel.com
patch subject: [PATCH v1 3/5] Input: gpio_decoder - replace custom loop by gpiod_get_array_value_cansleep()
config: x86_64-buildonly-randconfig-004-20251113 (https://download.01.org/0day-ci/archive/20251113/202511131832.JljMfKrW-lkp@xxxxxxxxx/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251113/202511131832.JljMfKrW-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/202511131832.JljMfKrW-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
In file included from include/linux/device.h:15,
from drivers/input/misc/gpio_decoder.c:10:
drivers/input/misc/gpio_decoder.c: In function 'gpio_decoder_get_gpios_state':
>> drivers/input/misc/gpio_decoder.c:38:67: error: 'val' undeclared (first use in this function)
38 | dev_err(decoder->dev, "Error reading GPIO: %d\n", val);
| ^~~
include/linux/dev_printk.h:110:37: note: in definition of macro 'dev_printk_index_wrap'
110 | _p_func(dev, fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
drivers/input/misc/gpio_decoder.c:38:17: note: in expansion of macro 'dev_err'
38 | dev_err(decoder->dev, "Error reading GPIO: %d\n", val);
| ^~~~~~~
drivers/input/misc/gpio_decoder.c:38:67: note: each undeclared identifier is reported only once for each function it appears in
38 | dev_err(decoder->dev, "Error reading GPIO: %d\n", val);
| ^~~
include/linux/dev_printk.h:110:37: note: in definition of macro 'dev_printk_index_wrap'
110 | _p_func(dev, fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
drivers/input/misc/gpio_decoder.c:38:17: note: in expansion of macro 'dev_err'
38 | dev_err(decoder->dev, "Error reading GPIO: %d\n", val);
| ^~~~~~~
vim +/val +38 drivers/input/misc/gpio_decoder.c
27
28 static int gpio_decoder_get_gpios_state(struct gpio_decoder *decoder)
29 {
30 struct gpio_descs *gpios = decoder->input_gpios;
31 DECLARE_BITMAP(values, 32);
32 unsigned int size;
33 int err;
34
35 size = min(gpios->ndescs, 32U);
36 err = gpiod_get_array_value_cansleep(size, gpios->desc, gpios->info, values);
37 if (err) {
> 38 dev_err(decoder->dev, "Error reading GPIO: %d\n", val);
39 return err;
40 }
41
42 return bitmap_read(values, 0, size);
43 }
44
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