linux-kernel - drivers/video/fbdev/amba-clcd.c:819:28: sparse: sparse: incorrect type in assignment (different address spaces)

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Message-ID: <202010080238.s90menB0-lkp@intel.com>
Date:   Thu, 8 Oct 2020 02:53:40 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Collingbourne <pcc@...gle.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>
Subject: drivers/video/fbdev/amba-clcd.c:819:28: sparse: sparse: incorrect
 type in assignment (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c85fb28b6f999db9928b841f63f1beeb3074eeca
commit: 112c35237c726cb2c6eed32db660f285938fb666 Partially revert "video: fbdev: amba-clcd: Retire elder CLCD driver"
date:   7 days ago
config: arm64-randconfig-s031-20201008 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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: v0.6.2-218-gc0e96d6d-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=112c35237c726cb2c6eed32db660f285938fb666
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 112c35237c726cb2c6eed32db660f285938fb666
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64 

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

echo
echo "sparse warnings: (new ones prefixed by >>)"
echo
>> drivers/video/fbdev/amba-clcd.c:819:28: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected char [noderef] __iomem *screen_base @@     got void * @@
>> drivers/video/fbdev/amba-clcd.c:819:28: sparse:     expected char [noderef] __iomem *screen_base
   drivers/video/fbdev/amba-clcd.c:819:28: sparse:     got void *
>> drivers/video/fbdev/amba-clcd.c:832:54: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void *cpu_addr @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/amba-clcd.c:832:54: sparse:     expected void *cpu_addr
>> drivers/video/fbdev/amba-clcd.c:832:54: sparse:     got char [noderef] __iomem *screen_base
   drivers/video/fbdev/amba-clcd.c:839:31: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void *cpu_addr @@     got char [noderef] __iomem *screen_base @@
   drivers/video/fbdev/amba-clcd.c:839:31: sparse:     expected void *cpu_addr
   drivers/video/fbdev/amba-clcd.c:839:31: sparse:     got char [noderef] __iomem *screen_base

vim +819 drivers/video/fbdev/amba-clcd.c

   806	
   807	static int clcdfb_of_dma_setup(struct clcd_fb *fb)
   808	{
   809		unsigned long framesize;
   810		dma_addr_t dma;
   811		int err;
   812	
   813		err = clcdfb_of_init_display(fb);
   814		if (err)
   815			return err;
   816	
   817		framesize = PAGE_ALIGN(fb->panel->mode.xres * fb->panel->mode.yres *
   818				fb->panel->bpp / 8);
 > 819		fb->fb.screen_base = dma_alloc_coherent(&fb->dev->dev, framesize,
   820				&dma, GFP_KERNEL);
   821		if (!fb->fb.screen_base)
   822			return -ENOMEM;
   823	
   824		fb->fb.fix.smem_start = dma;
   825		fb->fb.fix.smem_len = framesize;
   826	
   827		return 0;
   828	}
   829	
   830	static int clcdfb_of_dma_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
   831	{
 > 832		return dma_mmap_wc(&fb->dev->dev, vma, fb->fb.screen_base,
   833				   fb->fb.fix.smem_start, fb->fb.fix.smem_len);
   834	}
   835	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (33135 bytes)