linux-kernel - Re: [PATCH v5 5/5] i3c: hub: p3h2x4x: Add support for NXP P3H2x4x I3C hub functionality

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Message-ID: <202602070522.fcoiqtPw-lkp@intel.com>
Date: Sat, 7 Feb 2026 05:25:36 +0800
From: kernel test robot <lkp@...el.com>
To: Aman Kumar Pandey <aman.kumarpandey@....com>,
	linux-kernel@...r.kernel.org, linux-i3c@...ts.infradead.org,
	alexandre.belloni@...tlin.com, krzk+dt@...nel.org, robh@...nel.org,
	conor+dt@...nel.org, devicetree@...r.kernel.org, broonie@...nel.org,
	lee@...nel.org, Frank.Li@....com, lgirdwood@...il.com
Cc: oe-kbuild-all@...ts.linux.dev, vikash.bansal@....com,
	priyanka.jain@....com, shashank.rebbapragada@....com,
	Aman Kumar Pandey <aman.kumarpandey@....com>
Subject: Re: [PATCH v5 5/5] i3c: hub: p3h2x4x: Add support for NXP P3H2x4x
 I3C hub functionality

Hi Aman,

kernel test robot noticed the following build warnings:

[auto build test WARNING on lee-mfd/for-mfd-next]
[also build test WARNING on lee-mfd/for-mfd-fixes broonie-regulator/for-next linus/master v6.19-rc8]
[cannot apply to i3c/i3c/next next-20260205]
[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/Aman-Kumar-Pandey/dt-bindings-i3c-Add-NXP-P3H2x4x-i3c-hub-support/20260206-200552
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
patch link:    https://lore.kernel.org/r/20260206120121.856471-5-aman.kumarpandey%40nxp.com
patch subject: [PATCH v5 5/5] i3c: hub: p3h2x4x: Add support for NXP P3H2x4x I3C hub functionality
config: m68k-randconfig-r054-20260207 (https://download.01.org/0day-ci/archive/20260207/202602070522.fcoiqtPw-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260207/202602070522.fcoiqtPw-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602070522.fcoiqtPw-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/i3c/hub/p3h2840_i3c_hub_smbus.c: In function 'p3h2x4x_ibi_handler':
>> drivers/i3c/hub/p3h2840_i3c_hub_smbus.c:87:11: warning: unused variable 'i' [-Wunused-variable]
     u32 ret, i;
              ^
>> drivers/i3c/hub/p3h2840_i3c_hub_smbus.c:87:6: warning: unused variable 'ret' [-Wunused-variable]
     u32 ret, i;
         ^~~
>> drivers/i3c/hub/p3h2840_i3c_hub_smbus.c:86:44: warning: variable 'payload_byte_two' set but not used [-Wunused-but-set-variable]
     u32 target_port_status, payload_byte_one, payload_byte_two;
                                               ^~~~~~~~~~~~~~~~
>> drivers/i3c/hub/p3h2840_i3c_hub_smbus.c:86:6: warning: unused variable 'target_port_status' [-Wunused-variable]
     u32 target_port_status, payload_byte_one, payload_byte_two;
         ^~~~~~~~~~~~~~~~~~
>> drivers/i3c/hub/p3h2840_i3c_hub_smbus.c:85:30: warning: unused variable 'p3h2x4x_i3c_hub' [-Wunused-variable]
     struct p3h2x4x_i3c_hub_dev *p3h2x4x_i3c_hub = dev_get_drvdata(&i3cdev->dev);
                                 ^~~~~~~~~~~~~~~


vim +/i +87 drivers/i3c/hub/p3h2840_i3c_hub_smbus.c

    75	
    76	/**
    77	 * p3h2x4x_ibi_handler - IBI handler.
    78	 * @i3cdev: i3c device.
    79	 * @payload: two byte IBI payload data.
    80	 *
    81	 */
    82	void p3h2x4x_ibi_handler(struct i3c_device *i3cdev,
    83				 const struct i3c_ibi_payload *payload)
    84	{
  > 85		struct p3h2x4x_i3c_hub_dev *p3h2x4x_i3c_hub = dev_get_drvdata(&i3cdev->dev);
  > 86		u32 target_port_status, payload_byte_one, payload_byte_two;
  > 87		u32 ret, i;
    88	
    89		payload_byte_one = (*(int *)payload->data);
    90		payload_byte_two = (*(int *)(payload->data + 4));
    91	
    92		if (!(payload_byte_one & P3H2x4x_SMBUS_AGENT_EVENT_FLAG_STATUS))
    93			return;
    94	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki