linux-kernel - drivers/watchdog/ixp4xx_wdt.c:122:20: sparse: sparse: incorrect type in assignment (different address spaces)

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Message-ID: <202109101644.WLoG7mDr-lkp@intel.com>
Date:   Fri, 10 Sep 2021 16:53:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>
Subject: drivers/watchdog/ixp4xx_wdt.c:122:20: sparse: sparse: incorrect type
 in assignment (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   bf9f243f23e6623f310ba03fbb14e10ec3a61290
commit: 21a0a29d16c672b0c6e3662ea55969dccdbc5547 watchdog: ixp4xx: Rewrite driver to use core
date:   5 weeks ago
config: arm-randconfig-s032-20210910 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
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-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=21a0a29d16c672b0c6e3662ea55969dccdbc5547
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 21a0a29d16c672b0c6e3662ea55969dccdbc5547
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 

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/watchdog/ixp4xx_wdt.c:122:20: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *base @@     got void *platform_data @@
   drivers/watchdog/ixp4xx_wdt.c:122:20: sparse:     expected void [noderef] __iomem *base
   drivers/watchdog/ixp4xx_wdt.c:122:20: sparse:     got void *platform_data

vim +122 drivers/watchdog/ixp4xx_wdt.c

   106	
   107	static int ixp4xx_wdt_probe(struct platform_device *pdev)
   108	{
   109		struct device *dev = &pdev->dev;
   110		struct ixp4xx_wdt *iwdt;
   111		struct clk *clk;
   112		int ret;
   113	
   114		if (!(read_cpuid_id() & 0xf) && !cpu_is_ixp46x()) {
   115			dev_err(dev, "Rev. A0 IXP42x CPU detected - watchdog disabled\n");
   116			return -ENODEV;
   117		}
   118	
   119		iwdt = devm_kzalloc(dev, sizeof(*iwdt), GFP_KERNEL);
   120		if (!iwdt)
   121			return -ENOMEM;
 > 122		iwdt->base = dev->platform_data;
   123	
   124		/*
   125		 * Retrieve rate from a fixed clock from the device tree if
   126		 * the parent has that, else use the default clock rate.
   127		 */
   128		clk = devm_clk_get(dev->parent, NULL);
   129		if (!IS_ERR(clk)) {
   130			ret = clk_prepare_enable(clk);
   131			if (ret)
   132				return ret;
   133			ret = devm_add_action_or_reset(dev, ixp4xx_clock_action, clk);
   134			if (ret)
   135				return ret;
   136			iwdt->rate = clk_get_rate(clk);
   137		}
   138		if (!iwdt->rate)
   139			iwdt->rate = IXP4XX_TIMER_FREQ;
   140	
   141		iwdt->wdd.info = &ixp4xx_wdt_info;
   142		iwdt->wdd.ops = &ixp4xx_wdt_ops;
   143		iwdt->wdd.min_timeout = 1;
   144		iwdt->wdd.max_timeout = U32_MAX / iwdt->rate;
   145		iwdt->wdd.parent = dev;
   146		/* Default to 60 seconds */
   147		iwdt->wdd.timeout = 60U;
   148		watchdog_init_timeout(&iwdt->wdd, 0, dev);
   149	
   150		if (__raw_readl(iwdt->base + IXP4XX_OSST_OFFSET) &
   151		    IXP4XX_OSST_TIMER_WARM_RESET)
   152			iwdt->wdd.bootstatus = WDIOF_CARDRESET;
   153	
   154		ret = devm_watchdog_register_device(dev, &iwdt->wdd);
   155		if (ret)
   156			return ret;
   157	
   158		dev_info(dev, "IXP4xx watchdog available\n");
   159	
   160		return 0;
   161	}
   162	

---
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" (30364 bytes)