drivers/comedi/drivers/comedi_8254.c:139:31: sparse: sparse: cast to restricted __le16

drivers/comedi/drivers/comedi_8254.c:139:31: sparse: sparse: cast to restricted __le16

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8d8d276ba2fb5f9ac4984f5c10ae60858090babc
commit: 98a15816636044f25be4644db2a3e09fad68aaf7 Revert "comedi: add HAS_IOPORT dependencies"
date:   1 year ago
config: m68k-randconfig-r113-20240911 (https://download.01.org/0day-ci/archive/20240912/202409120105.yV1KBe45-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 14.1.0
reproduce: (https://download.01.org/0day-ci/archive/20240912/202409120105.yV1KBe45-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/202409120105.yV1KBe45-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/comedi/drivers/comedi_8254.c:139:31: sparse: sparse: cast to restricted __le16
>> drivers/comedi/drivers/comedi_8254.c:139:31: sparse: sparse: cast to restricted __le16
>> drivers/comedi/drivers/comedi_8254.c:139:31: sparse: sparse: cast to restricted __le16
>> drivers/comedi/drivers/comedi_8254.c:139:31: sparse: sparse: cast to restricted __le16
   drivers/comedi/drivers/comedi_8254.c: note: in included file (through arch/m68k/include/asm/io.h, include/linux/io.h):
   arch/m68k/include/asm/io_mm.h:164:21: sparse: sparse: Using plain integer as NULL pointer
   arch/m68k/include/asm/io_mm.h:164:21: sparse: sparse: Using plain integer as NULL pointer
   arch/m68k/include/asm/io_mm.h:164:21: sparse: sparse: Using plain integer as NULL pointer
   arch/m68k/include/asm/io_mm.h:164:21: sparse: sparse: Using plain integer as NULL pointer
   arch/m68k/include/asm/io_mm.h:164:21: sparse: sparse: Using plain integer as NULL pointer

vim +139 drivers/comedi/drivers/comedi_8254.c

d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  121  
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  122  static unsigned int __i8254_read(struct comedi_8254 *i8254, unsigned int reg)
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  123  {
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  124  	unsigned int reg_offset = (reg * i8254->iosize) << i8254->regshift;
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  125  	unsigned int val;
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  126  
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  127  	switch (i8254->iosize) {
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  128  	default:
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  129  	case I8254_IO8:
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  130  		if (i8254->mmio)
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  131  			val = readb(i8254->mmio + reg_offset);
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  132  		else
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  133  			val = inb(i8254->iobase + reg_offset);
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  134  		break;
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  135  	case I8254_IO16:
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  136  		if (i8254->mmio)
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  137  			val = readw(i8254->mmio + reg_offset);
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  138  		else
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23 @139  			val = inw(i8254->iobase + reg_offset);
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  140  		break;
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  141  	case I8254_IO32:
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  142  		if (i8254->mmio)
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  143  			val = readl(i8254->mmio + reg_offset);
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  144  		else
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  145  			val = inl(i8254->iobase + reg_offset);
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  146  		break;
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  147  	}
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  148  	return val & 0xff;
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  149  }
d42b5211d861f1 drivers/staging/comedi/drivers/comedi_8254.c H Hartley Sweeten 2015-02-23  150  

:::::: The code at line 139 was first introduced by commit
:::::: d42b5211d861f1077869e9133efa19297a6f152b staging: comedi: comedi_8254: introduce module for 8254 timer support

:::::: TO: H Hartley Sweeten <hsweeten@visionengravers.com>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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