tree: https://github.com/0day-ci/linux/commits/UPDATE-20210616-152150/tu-pham/U... head: 2231b2167ae347d41d081c3e62492ceb0c93c675 commit: 2231b2167ae347d41d081c3e62492ceb0c93c675 USB: serial: cp210x: add support for GPIOs on CP2108 date: 6 hours ago config: sparc-randconfig-s032-20210615 (attached as .config) compiler: sparc-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/2231b2167ae347d41d081c3e62492ceb0... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210616-152150/tu-pham/USB-serial-cp210x-Add-support-for-GPIOs-on-CP2108/20210426-171349 git checkout 2231b2167ae347d41d081c3e62492ceb0c93c675 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=sparc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/usb/serial/cp210x.c:1515:9: sparse: expected unsigned short [usertype] *p drivers/usb/serial/cp210x.c:1515:9: sparse: got restricted __le16 [usertype] * vim +1515 drivers/usb/serial/cp210x.c 1477 1478 static int cp210x_gpio_get(struct gpio_chip *gc, unsigned int gpio) 1479 { 1480 struct usb_serial *serial = gpiochip_get_data(gc); 1481 struct cp210x_serial_private *priv = usb_get_serial_data(serial); 1482 u8 req_type; 1483 u16 mask; 1484 int result; 1485 int len; 1486 1487 result = usb_autopm_get_interface(serial->interface); 1488 if (result) 1489 return result; 1490 1491 switch (priv->partnum) { 1492 case CP210X_PARTNUM_CP2105: 1493 req_type = REQTYPE_INTERFACE_TO_HOST; 1494 len = 1; 1495 break; 1496 case CP210X_PARTNUM_CP2108: 1497 req_type = REQTYPE_INTERFACE_TO_HOST; 1498 len = 2; 1499 break; 1500 default: 1501 req_type = REQTYPE_DEVICE_TO_HOST; 1502 len = 1; 1503 break; 1504 } 1505 1506 mask = 0; 1507 result = cp210x_read_vendor_block(serial, req_type, CP210X_READ_LATCH, 1508 &mask, len); 1509 1510 usb_autopm_put_interface(serial->interface); 1511 1512 if (result < 0) 1513 return result; 1514 1516 1517 return !!(mask & BIT(gpio)); 1518 } 1519 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org