Hi Luiz, I love your patch! Perhaps something to improve: [auto build test WARNING on bluetooth-next/master] [also build test WARNING on bluetooth/master] [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] url: https://github.com/0day-ci/linux/commits/Luiz-Augusto-von-Dentz/Bluetooth... base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master config: mips-allyesconfig (attached as .config) compiler: mips-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/8298fef36eee7525d4e8c7d2c8da9f947... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Luiz-Augusto-von-Dentz/Bluetooth-hci_sock-Add-support-for-BT_-SND-RCV-BUF/20210916-073730 git checkout 8298fef36eee7525d4e8c7d2c8da9f9473342308 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): net/bluetooth/hci_sock.c: In function 'hci_sock_getsockopt': 2058 | int len, err = 0; | ^~~ vim +/len +2058 net/bluetooth/hci_sock.c 2053 2054 static int hci_sock_getsockopt(struct socket *sock, int level, int optname, 2055 char __user *optval, int __user *optlen) 2056 { 2057 struct sock *sk = sock->sk; 2059 2060 BT_DBG("sk %p, opt %d", sk, optname); 2061 2062 if (level == SOL_HCI) 2063 return hci_sock_getsockopt_old(sock, level, optname, optval, 2064 optlen); 2065 2066 if (level != SOL_BLUETOOTH) 2067 return -ENOPROTOOPT; 2068 2069 if (get_user(len, optlen)) 2070 return -EFAULT; 2071 2072 lock_sock(sk); 2073 2074 switch (optname) { 2075 case BT_SNDMTU: 2076 case BT_RCVMTU: 2077 if (put_user(hci_pi(sk)->mtu, (u32 __user *)optval)) 2078 err = -EFAULT; 2079 break; 2080 2081 default: 2082 err = -ENOPROTOOPT; 2083 break; 2084 } 2085 2086 release_sock(sk); 2087 return err; 2088 } 2089 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org