linux-kernel - Re: [PATCH] misc: sram: Only map reserved areas in Tegra SYSRAM

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Date:   Fri, 18 Jun 2021 12:10:30 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mikko Perttunen <mperttunen@...dia.com>, arnd@...db.de,
        gregkh@...uxfoundation.org
Cc:     kbuild-all@...ts.01.org, ykaukab@...e.de,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mikko Perttunen <mperttunen@...dia.com>
Subject: Re: [PATCH] misc: sram: Only map reserved areas in Tegra SYSRAM

Hi Mikko,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on next-20210616]
[cannot apply to char-misc/char-misc-testing soc/for-next tegra-drm/drm/tegra/for-next v5.13-rc6 v5.13-rc5 v5.13-rc4 v5.13-rc6]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Mikko-Perttunen/misc-sram-Only-map-reserved-areas-in-Tegra-SYSRAM/20210617-174946
base:    c7d4c1fd91ab4a6d2620497921a9c6bf54650ab8
config: m68k-randconfig-s031-20210618 (attached as .config)
compiler: m68k-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: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/3108530c06411e371ed28777233c48d89fa61071
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Mikko-Perttunen/misc-sram-Only-map-reserved-areas-in-Tegra-SYSRAM/20210617-174946
        git checkout 3108530c06411e371ed28777233c48d89fa61071
        # 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__' W=1 ARCH=m68k 

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


sparse warnings: (new ones prefixed by >>)
>> drivers/misc/sram.c:105:35: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *virt_base @@     got void [noderef] __iomem * @@
   drivers/misc/sram.c:105:35: sparse:     expected void *virt_base
   drivers/misc/sram.c:105:35: sparse:     got void [noderef] __iomem *
   drivers/misc/sram.c:107:35: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *virt_base @@     got void [noderef] __iomem * @@
   drivers/misc/sram.c:107:35: sparse:     expected void *virt_base
   drivers/misc/sram.c:107:35: sparse:     got void [noderef] __iomem *
>> drivers/misc/sram.c:114:28: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *base @@     got void *virt_base @@
   drivers/misc/sram.c:114:28: sparse:     expected void [noderef] __iomem *base
   drivers/misc/sram.c:114:28: sparse:     got void *virt_base

vim +105 drivers/misc/sram.c

    92	
    93	static int sram_add_partition(struct sram_dev *sram, struct sram_reserve *block,
    94				      phys_addr_t start)
    95	{
    96		int ret;
    97		struct sram_partition *part = &sram->partition[sram->partitions];
    98	
    99		mutex_init(&part->lock);
   100	
   101		if (sram->config->map_only_reserved) {
   102			void *virt_base;
   103	
   104			if (sram->no_memory_wc)
 > 105				virt_base = devm_ioremap_resource(sram->dev, &block->res);
   106			else
   107				virt_base = devm_ioremap_resource_wc(sram->dev, &block->res);
   108	
   109			if (IS_ERR(virt_base)) {
   110				dev_err(sram->dev, "could not map SRAM at %pr\n", &block->res);
   111				return PTR_ERR(virt_base);
   112			}
   113	
 > 114			part->base = virt_base;
   115		} else {
   116			part->base = sram->virt_base + block->start;
   117		}
   118	
   119		if (block->pool) {
   120			ret = sram_add_pool(sram, block, start, part);
   121			if (ret)
   122				return ret;
   123		}
   124		if (block->export) {
   125			ret = sram_add_export(sram, block, start, part);
   126			if (ret)
   127				return ret;
   128		}
   129		if (block->protect_exec) {
   130			ret = sram_check_protect_exec(sram, block, part);
   131			if (ret)
   132				return ret;
   133	
   134			ret = sram_add_pool(sram, block, start, part);
   135			if (ret)
   136				return ret;
   137	
   138			sram_add_protect_exec(part);
   139		}
   140	
   141		sram->partitions++;
   142	
   143		return 0;
   144	}
   145	

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

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