linux-kernel - drivers/remoteproc/stm32_rproc.c:139:20: sparse: sparse: incorrect type in argument 1 (different address spaces)

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Date:   Sat, 18 Nov 2023 11:49:11 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
Subject: drivers/remoteproc/stm32_rproc.c:139:20: sparse: sparse: incorrect
 type in argument 1 (different address spaces)

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   791c8ab095f71327899023223940dd52257a4173
commit: 03bd158e1535e68bcd2b1e095b0ebcad7c84bd20 remoteproc: stm32: use correct format strings on 64-bit
date:   5 months ago
config: arm-randconfig-r121-20231118 (https://download.01.org/0day-ci/archive/20231118/202311181131.FV6wkpIs-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231118/202311181131.FV6wkpIs-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/202311181131.FV6wkpIs-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/remoteproc/stm32_rproc.c:122:12: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *va @@     got void [noderef] __iomem * @@
   drivers/remoteproc/stm32_rproc.c:122:12: sparse:     expected void *va
   drivers/remoteproc/stm32_rproc.c:122:12: sparse:     got void [noderef] __iomem *
>> drivers/remoteproc/stm32_rproc.c:139:20: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *io_addr @@     got void *va @@
   drivers/remoteproc/stm32_rproc.c:139:20: sparse:     expected void volatile [noderef] __iomem *io_addr
   drivers/remoteproc/stm32_rproc.c:139:20: sparse:     got void *va
   drivers/remoteproc/stm32_rproc.c:644:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/remoteproc/stm32_rproc.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...):
   include/linux/page-flags.h:240:46: sparse: sparse: self-comparison always evaluates to false

vim +139 drivers/remoteproc/stm32_rproc.c

13140de09cc2dd Fabien Dessenne 2019-05-14  114  
13140de09cc2dd Fabien Dessenne 2019-05-14  115  static int stm32_rproc_mem_alloc(struct rproc *rproc,
13140de09cc2dd Fabien Dessenne 2019-05-14  116  				 struct rproc_mem_entry *mem)
13140de09cc2dd Fabien Dessenne 2019-05-14  117  {
13140de09cc2dd Fabien Dessenne 2019-05-14  118  	struct device *dev = rproc->dev.parent;
13140de09cc2dd Fabien Dessenne 2019-05-14  119  	void *va;
13140de09cc2dd Fabien Dessenne 2019-05-14  120  
03bd158e1535e6 Arnd Bergmann   2023-06-09  121  	dev_dbg(dev, "map memory: %pad+%zx\n", &mem->dma, mem->len);
13140de09cc2dd Fabien Dessenne 2019-05-14 @122  	va = ioremap_wc(mem->dma, mem->len);
13140de09cc2dd Fabien Dessenne 2019-05-14  123  	if (IS_ERR_OR_NULL(va)) {
03bd158e1535e6 Arnd Bergmann   2023-06-09  124  		dev_err(dev, "Unable to map memory region: %pad+0x%zx\n",
13140de09cc2dd Fabien Dessenne 2019-05-14  125  			&mem->dma, mem->len);
13140de09cc2dd Fabien Dessenne 2019-05-14  126  		return -ENOMEM;
13140de09cc2dd Fabien Dessenne 2019-05-14  127  	}
13140de09cc2dd Fabien Dessenne 2019-05-14  128  
13140de09cc2dd Fabien Dessenne 2019-05-14  129  	/* Update memory entry va */
13140de09cc2dd Fabien Dessenne 2019-05-14  130  	mem->va = va;
13140de09cc2dd Fabien Dessenne 2019-05-14  131  
13140de09cc2dd Fabien Dessenne 2019-05-14  132  	return 0;
13140de09cc2dd Fabien Dessenne 2019-05-14  133  }
13140de09cc2dd Fabien Dessenne 2019-05-14  134  
13140de09cc2dd Fabien Dessenne 2019-05-14  135  static int stm32_rproc_mem_release(struct rproc *rproc,
13140de09cc2dd Fabien Dessenne 2019-05-14  136  				   struct rproc_mem_entry *mem)
13140de09cc2dd Fabien Dessenne 2019-05-14  137  {
13140de09cc2dd Fabien Dessenne 2019-05-14  138  	dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma);
13140de09cc2dd Fabien Dessenne 2019-05-14 @139  	iounmap(mem->va);
13140de09cc2dd Fabien Dessenne 2019-05-14  140  
13140de09cc2dd Fabien Dessenne 2019-05-14  141  	return 0;
13140de09cc2dd Fabien Dessenne 2019-05-14  142  }
13140de09cc2dd Fabien Dessenne 2019-05-14  143  

:::::: The code at line 139 was first introduced by commit
:::::: 13140de09cc2dd5e5166ad42292bb82af4e23cef remoteproc: stm32: add an ST stm32_rproc driver

:::::: TO: Fabien Dessenne <fabien.dessenne@...com>
:::::: CC: Bjorn Andersson <bjorn.andersson@...aro.org>

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