drivers/firmware/dmi_scan.c:145:13: sparse: sparse: incorrect type in assignment (different address spaces)

drivers/firmware/dmi_scan.c:145:13: sparse: sparse: incorrect type in assignment (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a39b6ac3781d46ba18193c9dbb2110f31e9bffe9
commit: aa5222e92f8000ed3c1c38dddf11c83222aadfb3 sched/deadline: Don't use dubious signed bitfields
date:   6 years ago
config: arm64-randconfig-r121-20231116 (https://download.01.org/0day-ci/archive/20231212/202312120718.oZqe253R-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231212/202312120718.oZqe253R-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/202312120718.oZqe253R-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/firmware/dmi_scan.c:145:13: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected unsigned char [usertype] *buf @@     got void [noderef] __iomem * @@
   drivers/firmware/dmi_scan.c:145:13: sparse:     expected unsigned char [usertype] *buf
   drivers/firmware/dmi_scan.c:145:13: sparse:     got void [noderef] __iomem *
>> drivers/firmware/dmi_scan.c:153:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char [usertype] *buf @@
   drivers/firmware/dmi_scan.c:153:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/firmware/dmi_scan.c:153:9: sparse:     got unsigned char [usertype] *buf
>> drivers/firmware/dmi_scan.c:736:19: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected unsigned char [usertype] *dmi_table @@     got void [noderef] __iomem * @@
   drivers/firmware/dmi_scan.c:736:19: sparse:     expected unsigned char [usertype] *dmi_table
   drivers/firmware/dmi_scan.c:736:19: sparse:     got void [noderef] __iomem *
>> drivers/firmware/dmi_scan.c:755:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char [usertype] *dmi_table @@
   drivers/firmware/dmi_scan.c:755:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/firmware/dmi_scan.c:755:9: sparse:     got unsigned char [usertype] *dmi_table
   drivers/firmware/dmi_scan.c:1031:13: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected unsigned char [usertype] *buf @@     got void [noderef] __iomem * @@
   drivers/firmware/dmi_scan.c:1031:13: sparse:     expected unsigned char [usertype] *buf
   drivers/firmware/dmi_scan.c:1031:13: sparse:     got void [noderef] __iomem *
   drivers/firmware/dmi_scan.c:1037:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char [usertype] *buf @@
   drivers/firmware/dmi_scan.c:1037:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/firmware/dmi_scan.c:1037:9: sparse:     got unsigned char [usertype] *buf

vim +145 drivers/firmware/dmi_scan.c

7fce084a0b3e2b drivers/firmware/dmi_scan.c Jean Delvare    2007-11-03  138  
e7a19c5624c66a drivers/firmware/dmi_scan.c Jean Delvare    2009-03-30  139  static int __init dmi_walk_early(void (*decode)(const struct dmi_header *,
e7a19c5624c66a drivers/firmware/dmi_scan.c Jean Delvare    2009-03-30  140  		void *))
7fce084a0b3e2b drivers/firmware/dmi_scan.c Jean Delvare    2007-11-03  141  {
7fce084a0b3e2b drivers/firmware/dmi_scan.c Jean Delvare    2007-11-03  142  	u8 *buf;
6e0ad59e3d838a drivers/firmware/dmi_scan.c Jean Delvare    2015-06-25  143  	u32 orig_dmi_len = dmi_len;
7fce084a0b3e2b drivers/firmware/dmi_scan.c Jean Delvare    2007-11-03  144  
6e0ad59e3d838a drivers/firmware/dmi_scan.c Jean Delvare    2015-06-25 @145  	buf = dmi_early_remap(dmi_base, orig_dmi_len);
7fce084a0b3e2b drivers/firmware/dmi_scan.c Jean Delvare    2007-11-03  146  	if (buf == NULL)
c926820085437a drivers/firmware/dmi_scan.c Andy Lutomirski 2017-06-15  147  		return -ENOMEM;
7fce084a0b3e2b drivers/firmware/dmi_scan.c Jean Delvare    2007-11-03  148  
eb4c5ea50e60aa drivers/firmware/dmi_scan.c Ivan Khoronzhuk 2015-06-25  149  	dmi_decode_table(buf, decode, NULL);
7fce084a0b3e2b drivers/firmware/dmi_scan.c Jean Delvare    2007-11-03  150  
d114a333874725 drivers/firmware/dmi_scan.c Tony Luck       2012-07-20  151  	add_device_randomness(buf, dmi_len);
d114a333874725 drivers/firmware/dmi_scan.c Tony Luck       2012-07-20  152  
6e0ad59e3d838a drivers/firmware/dmi_scan.c Jean Delvare    2015-06-25 @153  	dmi_early_unmap(buf, orig_dmi_len);
^1da177e4c3f41 arch/i386/kernel/dmi_scan.c Linus Torvalds  2005-04-16  154  	return 0;
^1da177e4c3f41 arch/i386/kernel/dmi_scan.c Linus Torvalds  2005-04-16  155  }
^1da177e4c3f41 arch/i386/kernel/dmi_scan.c Linus Torvalds  2005-04-16  156  

:::::: The code at line 145 was first introduced by commit
:::::: 6e0ad59e3d838a2887e7aa657baee5896030d009 firmware: dmi_scan: Trim DMI table length before exporting it

:::::: TO: Jean Delvare <jdelvare@suse.de>
:::::: CC: Jean Delvare <jdelvare@suse.de>

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