linux-kernel - drivers/remoteproc/stm32_rproc.c:655:25: sparse: sparse: Using plain integer as NULL pointer

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Date:   Mon, 31 Aug 2020 03:46:12 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: drivers/remoteproc/stm32_rproc.c:655:25: sparse: sparse: Using plain
 integer as NULL pointer

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1127b219ce9481c84edad9711626d856127d5e51
commit: 376ffdc044568fcd9982a89d57eed67874566f85 remoteproc: stm32: Properly set co-processor state when attaching
date:   6 weeks ago
config: arm-randconfig-s031-20200831 (attached as .config)
compiler: arm-linux-gnueabi-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: v0.6.2-191-g10164920-dirty
        git checkout 376ffdc044568fcd9982a89d57eed67874566f85
        # 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=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/remoteproc/stm32_rproc.c:118:12: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *va @@     got void [noderef] <asn:2> * @@
   drivers/remoteproc/stm32_rproc.c:118:12: sparse:     expected void *va
   drivers/remoteproc/stm32_rproc.c:118:12: sparse:     got void [noderef] <asn:2> *
   drivers/remoteproc/stm32_rproc.c:135:20: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] <asn:2> *iomem_cookie @@     got void *va @@
   drivers/remoteproc/stm32_rproc.c:135:20: sparse:     expected void volatile [noderef] <asn:2> *iomem_cookie
   drivers/remoteproc/stm32_rproc.c:135:20: sparse:     got void *va
>> drivers/remoteproc/stm32_rproc.c:655:25: sparse: sparse: Using plain integer as NULL pointer

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=376ffdc044568fcd9982a89d57eed67874566f85
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 376ffdc044568fcd9982a89d57eed67874566f85
vim +655 drivers/remoteproc/stm32_rproc.c

   645	
   646	static int stm32_rproc_get_m4_status(struct stm32_rproc *ddata,
   647					     unsigned int *state)
   648	{
   649		/* See stm32_rproc_parse_dt() */
   650		if (!ddata->m4_state.map) {
   651			/*
   652			 * We couldn't get the coprocessor's state, assume
   653			 * it is not running.
   654			 */
 > 655			state = M4_STATE_OFF;
   656			return 0;
   657		}
   658	
   659		return regmap_read(ddata->m4_state.map, ddata->m4_state.reg, state);
   660	}
   661	

---
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" (30559 bytes)