linux-kernel - drivers/mtd/nand/raw/nand_legacy.c:42:17: sparse: sparse: cast from restricted _

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Date:   Sun, 5 Nov 2023 14:02:28 +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/nand_legacy.c:42:17: sparse: sparse: cast from
 restricted __le16

Hi Miquel,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   aea6bf908d730b01bd264a8821159db9463c111c
commit: 72c5af00272339af6bbed6fe7275cd731f57be2d mtd: rawnand: Clarify Kconfig entry MTD_NAND
date:   4 years, 7 months ago
config: i386-randconfig-063-20231102 (https://download.01.org/0day-ci/archive/20231105/202311051313.EctUyZAY-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231105/202311051313.EctUyZAY-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/202311051313.EctUyZAY-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/mtd/nand/raw/nand_legacy.c:42:17: sparse: sparse: cast from restricted __le16

vim +42 drivers/mtd/nand/raw/nand_legacy.c

3d4af7c195850c Boris Brezillon 2018-09-07  32  
3d4af7c195850c Boris Brezillon 2018-09-07  33  /**
3d4af7c195850c Boris Brezillon 2018-09-07  34   * nand_read_byte16 - [DEFAULT] read one byte endianness aware from the chip
3d4af7c195850c Boris Brezillon 2018-09-07  35   * @chip: NAND chip object
3d4af7c195850c Boris Brezillon 2018-09-07  36   *
3d4af7c195850c Boris Brezillon 2018-09-07  37   * Default read function for 16bit buswidth with endianness conversion.
3d4af7c195850c Boris Brezillon 2018-09-07  38   *
3d4af7c195850c Boris Brezillon 2018-09-07  39   */
3d4af7c195850c Boris Brezillon 2018-09-07  40  static uint8_t nand_read_byte16(struct nand_chip *chip)
3d4af7c195850c Boris Brezillon 2018-09-07  41  {
3d4af7c195850c Boris Brezillon 2018-09-07 @42  	return (uint8_t) cpu_to_le16(readw(chip->legacy.IO_ADDR_R));
3d4af7c195850c Boris Brezillon 2018-09-07  43  }
3d4af7c195850c Boris Brezillon 2018-09-07  44  

:::::: The code at line 42 was first introduced by commit
:::::: 3d4af7c195850cfccaddc2cf03b010b95236b695 mtd: rawnand: Move legacy code to nand_legacy.c

:::::: TO: Boris Brezillon <boris.brezillon@...tlin.com>
:::::: CC: Miquel Raynal <miquel.raynal@...tlin.com>

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