linux-kernel - drivers/video/fbdev/omap/lcd_mipid.c:451:23: sparse: sparse: cast to restricted _

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Message-ID: <202209241328.q0WGI0RS-lkp@intel.com>
Date:   Sat, 24 Sep 2022 13:23:00 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/video/fbdev/omap/lcd_mipid.c:451:23: sparse: sparse: cast to
 restricted __be32

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a63f2e7cb1107ab124f80407e5eb8579c04eb7a9
commit: 804f7f19c2e2928aeb8eafef8379fe8b8d13f98b fbdev: omap: avoid using mach/*.h files
date:   5 months ago
config: arm-randconfig-s033-20220923
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
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: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=804f7f19c2e2928aeb8eafef8379fe8b8d13f98b
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 804f7f19c2e2928aeb8eafef8379fe8b8d13f98b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash drivers/video/fbdev/omap/ drivers/watchdog/

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

sparse warnings: (new ones prefixed by >>)
>> drivers/video/fbdev/omap/lcd_mipid.c:451:23: sparse: sparse: cast to restricted __be32

vim +451 drivers/video/fbdev/omap/lcd_mipid.c

66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  444  
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  445  static int panel_enabled(struct mipid_device *md)
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  446  {
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  447  	u32 disp_status;
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  448  	int enabled;
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  449  
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  450  	mipid_read(md, MIPID_CMD_READ_DISP_STATUS, (u8 *)&disp_status, 4);
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22 @451  	disp_status = __be32_to_cpu(disp_status);
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  452  	enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  453  	dev_dbg(&md->spi->dev,
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  454  		"LCD panel %senabled by bootloader (status 0x%04x)\n",
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  455  		enabled ? "" : "not ", disp_status);
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  456  	return enabled;
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  457  }
66d2f99d0bb5a2 drivers/video/omap/lcd_mipid.c Imre Deak 2009-09-22  458  

:::::: The code at line 451 was first introduced by commit
:::::: 66d2f99d0bb5a2972fb5c1d88b61169510e540d6 omapfb: add support for MIPI-DCS compatible LCDs

:::::: TO: Imre Deak <imre.deak@...ia.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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