[frank-w-bpi-r2-4.14:7.2-rc 35/160] drivers/net/dsa/mxl862xx_downstream/mxl862xx-host.c:158:27: sparse: sparse: cast to restricted __le16

[frank-w-bpi-r2-4.14:7.2-rc 35/160] drivers/net/dsa/mxl862xx_downstream/mxl862xx-host.c:158:27: sparse: sparse: cast to restricted __le16

[kernel test robot]

tree:   https://github.com/frank-w/BPI-R2-4.14 7.2-rc
head:   39cd8d05e83250c6294b8e0da3ca69359eff8a3c
commit: 96aefe538fdf60924d25ab9ee28d665648458ddc [35/160] net: dsa: add mxl downstream driver from 6.19-main
config: alpha-randconfig-r131-20260630 (https://download.01.org/0day-ci/archive/20260630/202606301619.ssT57BLC-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 14.3.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260630/202606301619.ssT57BLC-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606301619.ssT57BLC-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/net/dsa/mxl862xx_downstream/mxl862xx-host.c:158:27: sparse: sparse: cast to restricted __le16
>> drivers/net/dsa/mxl862xx_downstream/mxl862xx-host.c:193:33: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned short [usertype] @@     got restricted __le16 [usertype] @@
   drivers/net/dsa/mxl862xx_downstream/mxl862xx-host.c:193:33: sparse:     expected unsigned short [usertype]
   drivers/net/dsa/mxl862xx_downstream/mxl862xx-host.c:193:33: sparse:     got restricted __le16 [usertype]

vim +158 drivers/net/dsa/mxl862xx_downstream/mxl862xx-host.c

   128	
   129	int mxl862xx_api_wrap(struct mxl862xx_priv *priv, u16 cmd, void *_data,
   130			      u16 size, bool read)
   131	{
   132		u16 *data = _data;
   133		int16_t result = 0;
   134		u16 max, i;
   135		int ret;
   136	
   137		mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
   138	
   139		max = (size + 1) / 2;
   140	
   141		ret = mxl862xx_busy_wait(priv);
   142		if (ret < 0)
   143			goto out;
   144	
   145		for (i = 0; i < max; i++) {
   146			u16 off = i % MXL862XX_MMD_REG_DATA_MAX_SIZE;
   147	
   148			if (i && off == 0) {
   149				/* Send command to set data when every
   150				 * MXL862XX_MMD_REG_DATA_MAX_SIZE of WORDs are written.
   151				 */
   152				ret = mxl862xx_set_data(priv, i);
   153				if (ret < 0)
   154					goto out;
   155			}
   156	
   157			mxl862xx_write(priv, MXL862XX_MMD_REG_DATA_FIRST + off,
 > 158				  le16_to_cpu(data[i]));
   159		}
   160	
   161		ret = mxl862xx_send_cmd(priv, cmd, size, &result);
   162		if (ret < 0)
   163			goto out;
   164	
   165		if (result < 0) {
   166			ret = result;
   167			goto out;
   168		}
   169	
   170		for (i = 0; i < max && read; i++) {
   171			u16 off = i % MXL862XX_MMD_REG_DATA_MAX_SIZE;
   172	
   173			if (i && off == 0) {
   174				/* Send command to fetch next batch of data
   175				 * when every MXL862XX_MMD_REG_DATA_MAX_SIZE of WORDs
   176				 * are read.
   177				 */
   178				ret = mxl862xx_get_data(priv, i);
   179				if (ret < 0)
   180					goto out;
   181			}
   182	
   183			ret = mxl862xx_read(priv, MXL862XX_MMD_REG_DATA_FIRST + off);
   184			if (ret < 0)
   185				goto out;
   186	
   187			if ((i * 2 + 1) == size) {
   188				/* Special handling for last BYTE
   189				 * if it's not WORD aligned.
   190				 */
   191				*(uint8_t *)&data[i] = ret & 0xFF;
   192			} else {
 > 193				data[i] = cpu_to_le16((u16)ret);

--
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https://github.com/intel/lkp-tests/wiki