[xilinx-xlnx:xlnx_rebase_v5.15_LTS 760/1181] drivers/staging/xlnx_tsmux/xlnx_mpg2tsmux.c:1269:31: sparse: sparse: incorrect type in return expression (different base types)

[kernel test robot]

tree:   https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.15_LTS
head:   59523b5c4aca0174f1f8cba2a07d3b3328b7c80e
commit: ae063a9e0b59f584573826b8bab401039d7b74d3 [760/1181] staging: xlnx_tsmux: Initial version of xlnx mpeg2tsmux driver
config: h8300-randconfig-s032-20220619 (https://download.01.org/0day-ci/archive/20220619/202206191728.qdCh4R0C-lkp@intel.com/config)
compiler: h8300-linux-gcc (GCC) 11.3.0
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: v0.6.4-30-g92122700-dirty
        # https://github.com/Xilinx/linux-xlnx/commit/ae063a9e0b59f584573826b8bab401039d7b74d3
        git remote add xilinx-xlnx https://github.com/Xilinx/linux-xlnx
        git fetch --no-tags xilinx-xlnx xlnx_rebase_v5.15_LTS
        git checkout ae063a9e0b59f584573826b8bab401039d7b74d3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=h8300 SHELL=/bin/bash drivers/clk/ drivers/staging/xlnx_tsmux/

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


sparse warnings: (new ones prefixed by >>)
>> drivers/staging/xlnx_tsmux/xlnx_mpg2tsmux.c:1269:31: sparse: sparse: incorrect type in return expression (different base types) @@     expected restricted __poll_t @@     got int @@
   drivers/staging/xlnx_tsmux/xlnx_mpg2tsmux.c:1269:31: sparse:     expected restricted __poll_t
   drivers/staging/xlnx_tsmux/xlnx_mpg2tsmux.c:1269:31: sparse:     got int
   drivers/staging/xlnx_tsmux/xlnx_mpg2tsmux.c: note: in included file (through include/linux/scatterlist.h, include/linux/dmapool.h):
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:26:18: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:26:18: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:26:18: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:26:18: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:26:18: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:26:18: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:26:18: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:26:18: sparse: sparse: cast removes address space '__iomem' of expression
   arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression

vim +1269 drivers/staging/xlnx_tsmux/xlnx_mpg2tsmux.c

  1261	
  1262	static __poll_t xlnx_tsmux_poll(struct file *fptr, poll_table *wait)
  1263	{
  1264		struct xlnx_tsmux *mpgmuxts = fptr->private_data;
  1265	
  1266		poll_wait(fptr, &mpgmuxts->waitq, wait);
  1267	
  1268		if (xlnx_tsmux_read(mpgmuxts, XTSMUX_LAST_NODE_PROCESSED))
> 1269			return POLLIN | POLLPRI;
  1270	
  1271		return 0;
  1272	}
  1273	

-- 
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https://01.org/lkp