linux-kernel - [drm-misc:drm-misc-next 2/10] drivers/gpu/drm/mgag200/mgag200_g200.c:120:14: warning: assignment to 'unsigned char *' from 'int' makes pointer from integer without a cast

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Date:   Wed, 8 Jun 2022 04:06:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Jocelyn Falempe <jfalempe@...hat.com>
Subject: [drm-misc:drm-misc-next 2/10]
 drivers/gpu/drm/mgag200/mgag200_g200.c:120:14: warning: assignment to
 'unsigned char *' from 'int' makes pointer from integer without a cast

tree:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
head:   dfa687bffc8a4a21ed929c7dececf01b8f1f52ee
commit: 85397f6bc4ff13a6bc5259facb8ebebb1986d666 [2/10] drm/mgag200: Initialize each model in separate function
config: parisc-allyesconfig (https://download.01.org/0day-ci/archive/20220608/202206080411.JpdjEVh2-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git remote add drm-misc git://anongit.freedesktop.org/drm/drm-misc
        git fetch --no-tags drm-misc drm-misc-next
        git checkout 85397f6bc4ff13a6bc5259facb8ebebb1986d666
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=parisc SHELL=/bin/bash drivers/gpu/drm/mgag200/

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

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/mgag200/mgag200_g200.c: In function 'mgag200_g200_init_refclk':
   drivers/gpu/drm/mgag200/mgag200_g200.c:120:16: error: implicit declaration of function 'vmalloc'; did you mean 'kvmalloc'? [-Werror=implicit-function-declaration]
     120 |         bios = vmalloc(size);
         |                ^~~~~~~
         |                kvmalloc
>> drivers/gpu/drm/mgag200/mgag200_g200.c:120:14: warning: assignment to 'unsigned char *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     120 |         bios = vmalloc(size);
         |              ^
   drivers/gpu/drm/mgag200/mgag200_g200.c:131:9: error: implicit declaration of function 'vfree'; did you mean 'kvfree'? [-Werror=implicit-function-declaration]
     131 |         vfree(bios);
         |         ^~~~~
         |         kvfree
   cc1: some warnings being treated as errors


vim +120 drivers/gpu/drm/mgag200/mgag200_g200.c

   102	
   103	static void mgag200_g200_init_refclk(struct mgag200_g200_device *g200)
   104	{
   105		struct mga_device *mdev = &g200->base;
   106		struct drm_device *dev = &mdev->base;
   107		struct pci_dev *pdev = to_pci_dev(dev->dev);
   108		unsigned char __iomem *rom;
   109		unsigned char *bios;
   110		size_t size;
   111	
   112		g200->pclk_min = 50000;
   113		g200->pclk_max = 230000;
   114		g200->ref_clk = 27050;
   115	
   116		rom = pci_map_rom(pdev, &size);
   117		if (!rom)
   118			return;
   119	
 > 120		bios = vmalloc(size);
   121		if (!bios)
   122			goto out;
   123		memcpy_fromio(bios, rom, size);
   124	
   125		if (size != 0 && bios[0] == 0x55 && bios[1] == 0xaa)
   126			mgag200_g200_interpret_bios(g200, bios, size);
   127	
   128		drm_dbg_kms(dev, "pclk_min: %ld pclk_max: %ld ref_clk: %ld\n",
   129			    g200->pclk_min, g200->pclk_max, g200->ref_clk);
   130	
   131		vfree(bios);
   132	out:
   133		pci_unmap_rom(pdev, rom);
   134	}
   135	

-- 
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