Hi Anant, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.9 next-20201012] [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/Anant-Thazhemadam/net-usb-usbnet... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 6f2f486d57c4d562cdf4932320b66fbb878ab1c4 config: x86_64-randconfig-a005-20201012 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 9e72d3eaf38f217698f72cb8fdc969a6e72dad3a) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/77da62a1a1fcc73c3d8309c273dfd4d49... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Anant-Thazhemadam/net-usb-usbnet-update-__usbnet_-read-write-_cmd-to-use-new-API/20201010-145950 git checkout 77da62a1a1fcc73c3d8309c273dfd4d497918c6e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/net/usb/usbnet.c:1990:9: error: implicit declaration of function 'usb_control_msg_recv' [-Werror,-Wimplicit-function-declaration] return usb_control_msg_recv(dev->udev, 0, ^ drivers/net/usb/usbnet.c:1990:9: note: did you mean 'usb_control_msg'? include/linux/usb.h:1794:12: note: 'usb_control_msg' declared here extern int usb_control_msg(struct usb_device *dev, unsigned int pipe, ^ drivers/net/usb/usbnet.c:2008:9: error: implicit declaration of function 'usb_control_msg_send' [-Werror,-Wimplicit-function-declaration] return usb_control_msg_send(dev->udev, 0, ^ drivers/net/usb/usbnet.c:2008:9: note: did you mean 'usb_control_msg'? include/linux/usb.h:1794:12: note: 'usb_control_msg' declared here extern int usb_control_msg(struct usb_device *dev, unsigned int pipe, ^ USB_CTRL_SET_TIMEOUT, GPF_KERNEL); ^ 3 errors generated. vim +/GPF_KERNEL +2010 drivers/net/usb/usbnet.c 1994 1995 static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, 1996 u16 value, u16 index, const void *data, 1997 u16 size) 1998 { 1999 netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" 2000 " value=0x%04x index=0x%04x size=%d\n", 2001 cmd, reqtype, value, index, size); 2002 2003 if (size && !data) { 2004 WARN_ON_ONCE(1); 2005 return -EINVAL; 2006 } 2007 2008 return usb_control_msg_send(dev->udev, 0, 2009 cmd, reqtype, value, index, data, size, 2011 } 2012 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org