linux-kernel - drivers/rpmsg/qcom_glink_smem.c:93:17: sparse: sparse: incorrect type in argument 2 (different address spaces)

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Date:   Thu, 14 Dec 2023 07:13:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arun Kumar Neelakantam <aneela@...eaurora.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Bjorn Andersson <andersson@...nel.org>
Subject: drivers/rpmsg/qcom_glink_smem.c:93:17: sparse: sparse: incorrect
 type in argument 2 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5bd7ef53ffe5ca580e93e74eb8c81ed191ddc4bd
commit: 928002a5e9dab2ddc1a0fe3e00739e89be30dc6b rpmsg: glink: smem: Support rx peak for size less than 4 bytes
date:   5 years ago
config: arm-randconfig-r131-20231117 (https://download.01.org/0day-ci/archive/20231214/202312140746.AMlosG0F-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231214/202312140746.AMlosG0F-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312140746.AMlosG0F-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/rpmsg/qcom_glink_smem.c:93:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const volatile [noderef] __iomem *from @@     got void * @@
   drivers/rpmsg/qcom_glink_smem.c:93:17: sparse:     expected void const volatile [noderef] __iomem *from
   drivers/rpmsg/qcom_glink_smem.c:93:17: sparse:     got void *
>> drivers/rpmsg/qcom_glink_smem.c:96:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const volatile [noderef] __iomem *from @@     got void *fifo @@
   drivers/rpmsg/qcom_glink_smem.c:96:17: sparse:     expected void const volatile [noderef] __iomem *from
   drivers/rpmsg/qcom_glink_smem.c:96:17: sparse:     got void *fifo

vim +93 drivers/rpmsg/qcom_glink_smem.c

    78	
    79	static void glink_smem_rx_peak(struct qcom_glink_pipe *np,
    80				       void *data, unsigned int offset, size_t count)
    81	{
    82		struct glink_smem_pipe *pipe = to_smem_pipe(np);
    83		size_t len;
    84		u32 tail;
    85	
    86		tail = le32_to_cpu(*pipe->tail);
    87		tail += offset;
    88		if (tail >= pipe->native.length)
    89			tail -= pipe->native.length;
    90	
    91		len = min_t(size_t, count, pipe->native.length - tail);
    92		if (len)
  > 93			memcpy_fromio(data, pipe->fifo + tail, len);
    94	
    95		if (len != count)
  > 96			memcpy_fromio(data + len, pipe->fifo, (count - len));
    97	}
    98	

-- 
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https://github.com/intel/lkp-tests/wiki