Re: [PATCH v4 4/4] Bluetooth: btusb: mediatek: add ISO data transmission functions

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

Hi Chris,

kernel test robot noticed the following build warnings:

[auto build test WARNING on bluetooth-next/master]
[also build test WARNING on next-20240607]
[cannot apply to bluetooth/master linus/master v6.10-rc2]
[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/Chris-Lu/Bluetooth-net-add-hci_iso_hdr-function-for-iso-data/20240606-194619
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master
patch link:    https://lore.kernel.org/r/20240606114321.30515-5-chris.lu%40mediatek.com
patch subject: [PATCH v4 4/4] Bluetooth: btusb: mediatek: add ISO data transmission functions
config: arm-omap2plus_defconfig (https://download.01.org/0day-ci/archive/20240608/202406081451.S72dkwTp-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240608/202406081451.S72dkwTp-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/202406081451.S72dkwTp-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/bluetooth/btusb.c:28:
   drivers/bluetooth/btmtk.h: In function 'btmtk_isopkt_pad':
>> drivers/bluetooth/btmtk.h:259:16: warning: returning 'void *' from a function with return type 'int' makes integer from pointer without a cast [-Wint-conversion]
     259 |         return ERR_PTR(-EOPNOTSUPP);
         |                ^~~~~~~~~~~~~~~~~~~~


vim +259 drivers/bluetooth/btmtk.h

   256	
   257	static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb)
   258	{
 > 259		return ERR_PTR(-EOPNOTSUPP);
   260	}
   261	

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