Subject: Re: [Intel-wired-lan] [PATCH net-next 06/12] dpll: Support dynamic pin index allocation

From: kernel test robot <[email-masked]>
Date: Sat, 10 Jan 2026 00:34:30 +0100

Hi Ivan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Ivan-Vecera/dt-bindings-dpll-add-common-dpll-pin-consumer-schema/20260109-022618
base:   net-next/main
patch link:    https://lore.kernel.org/r/20260108182318.20935-7-ivecera%40redhat.com
patch subject: [Intel-wired-lan] [PATCH net-next 06/12] dpll: Support dynamic pin index allocation
config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20260110/[email-masked]/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/20260110/[email-masked]/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 <[email-masked]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/

All warnings (new ones prefixed by >>):

   drivers/dpll/dpll_core.c: In function 'dpll_pin_idx_free':
>> drivers/dpll/dpll_core.c:499:28: warning: integer overflow in expression of type 'int' results in '-2147483648' [-Woverflow]
     499 |         pin_idx -= INT_MAX + 1;
         |                            ^

vim +499 drivers/dpll/dpll_core.c

   490	
   491	static void dpll_pin_idx_free(u32 pin_idx)
   492	{
   493		if (pin_idx <= INT_MAX)
   494			return; /* Not a dynamic pin index */
   495	
   496		/* Map the index value from dynamic pin index range to IDA range and
   497		 * free it.
   498		 */
 > 499		pin_idx -= INT_MAX + 1;
   500		ida_free(&dpll_pin_idx_ida, pin_idx);
   501	}
   502	

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