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Message-ID: <202305152201.1x7qT03W-lkp@intel.com>
Date:   Mon, 15 May 2023 23:55:05 +0800
From:   kernel test robot <lkp@...el.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: drivers/gpu/drm/gma500/fbdev.c:245:9: sparse: sparse: incorrect type
 in argument 1 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6
commit: 8f1aaccb04b7cf63135f4e2748226dfa2fb01e3f drm/gma500: Implement client-based fbdev emulation
date:   8 weeks ago
config: x86_64-randconfig-s032-20230515
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce:
        # 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=8f1aaccb04b7cf63135f4e2748226dfa2fb01e3f
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 8f1aaccb04b7cf63135f4e2748226dfa2fb01e3f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/gma500/ drivers/thermal/intel/int340x_thermal/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305152201.1x7qT03W-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/gma500/fbdev.c:245:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const * @@     got char [noderef] __iomem *screen_base @@
   drivers/gpu/drm/gma500/fbdev.c:245:9: sparse:     expected void const *
   drivers/gpu/drm/gma500/fbdev.c:245:9: sparse:     got char [noderef] __iomem *screen_base
>> drivers/gpu/drm/gma500/fbdev.c:245:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const * @@     got char [noderef] __iomem *screen_base @@
   drivers/gpu/drm/gma500/fbdev.c:245:9: sparse:     expected void const *
   drivers/gpu/drm/gma500/fbdev.c:245:9: sparse:     got char [noderef] __iomem *screen_base
>> drivers/gpu/drm/gma500/fbdev.c:245:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *p @@     got char [noderef] __iomem *screen_base @@
   drivers/gpu/drm/gma500/fbdev.c:245:9: sparse:     expected void *p
   drivers/gpu/drm/gma500/fbdev.c:245:9: sparse:     got char [noderef] __iomem *screen_base

vim +245 drivers/gpu/drm/gma500/fbdev.c

   158	
   159	/*
   160	 * struct drm_fb_helper_funcs
   161	 */
   162	
   163	static int psb_fbdev_fb_probe(struct drm_fb_helper *fb_helper,
   164				      struct drm_fb_helper_surface_size *sizes)
   165	{
   166		struct drm_device *dev = fb_helper->dev;
   167		struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
   168		struct pci_dev *pdev = to_pci_dev(dev->dev);
   169		struct fb_info *info;
   170		struct drm_framebuffer *fb;
   171		struct drm_mode_fb_cmd2 mode_cmd = { };
   172		int size;
   173		int ret;
   174		struct psb_gem_object *backing;
   175		struct drm_gem_object *obj;
   176		u32 bpp, depth;
   177	
   178		/* No 24-bit packed mode */
   179		if (sizes->surface_bpp == 24) {
   180			sizes->surface_bpp = 32;
   181			sizes->surface_depth = 24;
   182		}
   183		bpp = sizes->surface_bpp;
   184		depth = sizes->surface_depth;
   185	
   186		/*
   187		 * If the mode does not fit in 32 bit then switch to 16 bit to get
   188		 * a console on full resolution. The X mode setting server will
   189		 * allocate its own 32-bit GEM framebuffer.
   190		 */
   191		size = ALIGN(sizes->surface_width * DIV_ROUND_UP(bpp, 8), 64) *
   192			     sizes->surface_height;
   193		size = ALIGN(size, PAGE_SIZE);
   194	
   195		if (size > dev_priv->vram_stolen_size) {
   196			sizes->surface_bpp = 16;
   197			sizes->surface_depth = 16;
   198		}
   199		bpp = sizes->surface_bpp;
   200		depth = sizes->surface_depth;
   201	
   202		mode_cmd.width = sizes->surface_width;
   203		mode_cmd.height = sizes->surface_height;
   204		mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64);
   205		mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
   206	
   207		size = mode_cmd.pitches[0] * mode_cmd.height;
   208		size = ALIGN(size, PAGE_SIZE);
   209	
   210		/* Allocate the framebuffer in the GTT with stolen page backing */
   211		backing = psb_gem_create(dev, size, "fb", true, PAGE_SIZE);
   212		if (IS_ERR(backing))
   213			return PTR_ERR(backing);
   214		obj = &backing->base;
   215	
   216		fb = psb_framebuffer_create(dev, &mode_cmd, obj);
   217		if (IS_ERR(fb)) {
   218			ret = PTR_ERR(fb);
   219			goto err_drm_gem_object_put;
   220		}
   221	
   222		fb_helper->fb = fb;
   223	
   224		info = drm_fb_helper_alloc_info(fb_helper);
   225		if (IS_ERR(info)) {
   226			ret = PTR_ERR(info);
   227			goto err_drm_framebuffer_unregister_private;
   228		}
   229	
   230		info->fbops = &psb_fbdev_fb_ops;
   231		info->flags = FBINFO_DEFAULT;
   232		/* Accessed stolen memory directly */
   233		info->screen_base = dev_priv->vram_addr + backing->offset;
   234		info->screen_size = size;
   235	
   236		drm_fb_helper_fill_info(info, fb_helper, sizes);
   237	
   238		info->fix.smem_start = dev_priv->fb_base;
   239		info->fix.smem_len = size;
   240		info->fix.ywrapstep = 0;
   241		info->fix.ypanstep = 0;
   242		info->fix.mmio_start = pci_resource_start(pdev, 0);
   243		info->fix.mmio_len = pci_resource_len(pdev, 0);
   244	
 > 245		memset(info->screen_base, 0, info->screen_size);
   246	
   247		/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
   248	
   249		dev_dbg(dev->dev, "allocated %dx%d fb\n", fb->width, fb->height);
   250	
   251		return 0;
   252	
   253	err_drm_framebuffer_unregister_private:
   254		drm_framebuffer_unregister_private(fb);
   255		fb->obj[0] = NULL;
   256		drm_framebuffer_cleanup(fb);
   257		kfree(fb);
   258	err_drm_gem_object_put:
   259		drm_gem_object_put(obj);
   260		return ret;
   261	}
   262	

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

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