[tiwai-sound:topic/midi20 9/40] sound/usb/midi2.c:548:16: sparse: sparse: cast to restricted __le16

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git topic/midi20
head:   77700b81bd0e47d89d50eb4b3f2f323492f79998
commit: ff49d1df79aef7580fe3ac99d17c3f886655d080 [9/40] ALSA: usb-audio: USB MIDI 2.0 UMP support
config: microblaze-randconfig-s032-20230526 (https://download.01.org/0day-ci/archive/20230527/202305270534.odwHL9F0-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 12.1.0
reproduce:
        mkdir -p ~/bin
        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: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?id=ff49d1df79aef7580fe3ac99d17c3f886655d080
        git remote add tiwai-sound https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
        git fetch --no-tags tiwai-sound topic/midi20
        git checkout ff49d1df79aef7580fe3ac99d17c3f886655d080
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 ~/bin/make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=microblaze olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 ~/bin/make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=microblaze SHELL=/bin/bash sound/usb/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305270534.odwHL9F0-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> sound/usb/midi2.c:548:16: sparse: sparse: cast to restricted __le16
>> sound/usb/midi2.c:548:16: sparse: sparse: cast to restricted __le16
>> sound/usb/midi2.c:548:16: sparse: sparse: cast to restricted __le16
>> sound/usb/midi2.c:548:16: sparse: sparse: cast to restricted __le16

vim +548 sound/usb/midi2.c

   530	
   531	/* get the full group terminal block descriptors and return the size */
   532	static int get_group_terminal_block_descs(struct snd_usb_midi2_interface *umidi)
   533	{
   534		struct usb_host_interface *hostif = umidi->hostif;
   535		struct usb_device *dev = umidi->chip->dev;
   536		struct usb_ms20_gr_trm_block_header_descriptor header = { 0 };
   537		unsigned char *data;
   538		int err, size;
   539	
   540		err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
   541				      USB_REQ_GET_DESCRIPTOR,
   542				      USB_RECIP_INTERFACE | USB_TYPE_STANDARD | USB_DIR_IN,
   543				      USB_DT_CS_GR_TRM_BLOCK << 8 | hostif->desc.bAlternateSetting,
   544				      hostif->desc.bInterfaceNumber,
   545				      &header, sizeof(header));
   546		if (err < 0)
   547			return err;
 > 548		size = __le16_to_cpu(header.wTotalLength);
   549		if (!size) {
   550			dev_err(&dev->dev, "Failed to get GTB descriptors for %d:%d\n",
   551				hostif->desc.bInterfaceNumber, hostif->desc.bAlternateSetting);
   552			return -EINVAL;
   553		}
   554	
   555		data = kzalloc(size, GFP_KERNEL);
   556		if (!data)
   557			return -ENOMEM;
   558	
   559		err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
   560				      USB_REQ_GET_DESCRIPTOR,
   561				      USB_RECIP_INTERFACE | USB_TYPE_STANDARD | USB_DIR_IN,
   562				      USB_DT_CS_GR_TRM_BLOCK << 8 | hostif->desc.bAlternateSetting,
   563				      hostif->desc.bInterfaceNumber, data, size);
   564		if (err < 0) {
   565			kfree(data);
   566			return err;
   567		}
   568	
   569		umidi->blk_descs = data;
   570		umidi->blk_desc_size = size;
   571		return 0;
   572	}
   573	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki