linux-kernel - drivers/mtd/nand/raw/sh_flctl.c:512:17: sparse: sparse: cast from restricted _

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Date:   Fri, 1 Dec 2023 11:50:22 +0800
From:   kernel test robot <lkp@...el.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: drivers/mtd/nand/raw/sh_flctl.c:512:17: sparse: sparse: cast from
 restricted __be32

Hi Miquel,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2594faafeee2f4406ff82790604e4e3f55037d60
commit: 72c5af00272339af6bbed6fe7275cd731f57be2d mtd: rawnand: Clarify Kconfig entry MTD_NAND
date:   4 years, 7 months ago
config: arm-randconfig-r123-20231107 (https://download.01.org/0day-ci/archive/20231201/202312011129.WKO5RkaC-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231201/202312011129.WKO5RkaC-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312011129.WKO5RkaC-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/mtd/nand/raw/sh_flctl.c:458:16: sparse: sparse: cast to restricted __le32
   drivers/mtd/nand/raw/sh_flctl.c:481:26: sparse: sparse: cast to restricted __be32
   drivers/mtd/nand/raw/sh_flctl.c:496:38: sparse: sparse: cast to restricted __be32
>> drivers/mtd/nand/raw/sh_flctl.c:512:17: sparse: sparse: cast from restricted __be32
   drivers/mtd/nand/raw/sh_flctl.c:525:24: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long @@     got restricted __be32 [usertype] @@
   drivers/mtd/nand/raw/sh_flctl.c:525:24: sparse:     expected unsigned long
   drivers/mtd/nand/raw/sh_flctl.c:525:24: sparse:     got restricted __be32 [usertype]

vim +512 drivers/mtd/nand/raw/sh_flctl.c

6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  502  
e8a9d8f31c592e drivers/mtd/nand/sh_flctl.c Bastian Hecht     2012-10-19  503  static void write_fiforeg(struct sh_flctl *flctl, int rlen,
e8a9d8f31c592e drivers/mtd/nand/sh_flctl.c Bastian Hecht     2012-10-19  504  						unsigned int offset)
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  505  {
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  506  	int i, len_4align;
e8a9d8f31c592e drivers/mtd/nand/sh_flctl.c Bastian Hecht     2012-10-19  507  	unsigned long *buf = (unsigned long *)&flctl->done_buff[offset];
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  508  
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  509  	len_4align = (rlen + 3) / 4;
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  510  	for (i = 0; i < len_4align; i++) {
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  511  		wait_wfifo_ready(flctl);
e8a9d8f31c592e drivers/mtd/nand/sh_flctl.c Bastian Hecht     2012-10-19 @512  		writel(cpu_to_be32(buf[i]), FLDTFIFO(flctl));
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  513  	}
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  514  }
6028aa01f759a1 drivers/mtd/nand/sh_flctl.c Yoshihiro Shimoda 2008-10-14  515  

:::::: The code at line 512 was first introduced by commit
:::::: e8a9d8f31c592eea89f1b0d3fd425e7a96944e88 mtd: sh_flctl: Minor cleanups

:::::: TO: Bastian Hecht <hechtb@...glemail.com>
:::::: CC: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>

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