tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
head:   465d4dd073f72a6348577ed0f7aa4aa00c9264bc
commit: a6f523ee41bfe7ef71110d4ae556339d0520efdd [2/23] usb: gadget: uvc: add validate and fix function for uvc response
config: hexagon-buildonly-randconfig-r006-20221128
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 6e4cea55f0d1104408b26ac574566a0e4de48036)
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://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?id=a6f523ee41bfe7ef71110d4ae556339d0520efdd
        git remote add usb https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
        git fetch --no-tags usb usb-testing
        git checkout a6f523ee41bfe7ef71110d4ae556339d0520efdd
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/usb/gadget/function/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/usb/gadget/function/uvc_v4l2.c:24:
   In file included from drivers/usb/gadget/function/uvc.h:15:
   In file included from include/linux/usb/composite.h:27:
   In file included from include/linux/usb/gadget.h:23:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from drivers/usb/gadget/function/uvc_v4l2.c:24:
   In file included from drivers/usb/gadget/function/uvc.h:15:
   In file included from include/linux/usb/composite.h:27:
   In file included from include/linux/usb/gadget.h:23:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from drivers/usb/gadget/function/uvc_v4l2.c:24:
   In file included from drivers/usb/gadget/function/uvc.h:15:
   In file included from include/linux/usb/composite.h:27:
   In file included from include/linux/usb/gadget.h:23:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
>> drivers/usb/gadget/function/uvc_v4l2.c:266:3: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
                   default:
                   ^
   drivers/usb/gadget/function/uvc_v4l2.c:266:3: note: insert 'break;' to avoid fall-through
                   default:
                   ^
                   break; 
   7 warnings generated.


vim +266 drivers/usb/gadget/function/uvc_v4l2.c

   241	
   242	static int
   243	uvc_send_response(struct uvc_device *uvc, struct uvc_request_data *data)
   244	{
   245		struct usb_composite_dev *cdev = uvc->func.config->cdev;
   246		struct usb_request *req = uvc->control_req;
   247	
   248		if (data->length < 0)
   249			return usb_ep_set_halt(cdev->gadget->ep0);
   250	
   251		req->length = min_t(unsigned int, uvc->event_length, data->length);
   252		req->zero = data->length < uvc->event_length;
   253	
   254		memcpy(req->buf, data->data, req->length);
   255	
   256		/* validate the ctrl content and fixup */
   257		if (!uvc->event_setup_out) {
   258			struct uvc_streaming_control *ctrl = req->buf;
   259	
   260			switch (uvc->streaming_request) {
   261			case UVC_GET_CUR:
   262			case UVC_GET_MIN:
   263			case UVC_GET_MAX:
   264			case UVC_GET_DEF:
   265				uvc_validate_streaming_ctrl(uvc, ctrl);
 > 266			default:
   267				break;
   268			}
   269		}
   270	
   271		return usb_ep_queue(cdev->gadget->ep0, req, GFP_KERNEL);
   272	}
   273	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp