linux-kernel - [mchinth: sep_socwatch_linux_5_9 32/41] drivers/platform/x86/sepdk/sep/pci.c:365:17: sparse: sparse: cast removes address space '_

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Message-ID: <202107311441.ev1u83qm-lkp@intel.com>
Date:   Sat, 31 Jul 2021 14:59:47 +0800
From:   kernel test robot <lkp@...el.com>
To:     Manisha Chinthapally <manisha.chinthapally@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Faycal Benmlih <faycal.benmlih@...el.com>
Subject: [mchinth: sep_socwatch_linux_5_9 32/41] drivers/platform/x86/sepdk/sep/pci.c:365:17: sparse: sparse: cast removes address space '__iomem' of expression

tree:   https://github.com/mchinth/linux  sep_socwatch_linux_5_9
head:   7296486889985b9d9895a39f551764a4b0425bea
commit: 4a8adda8065c4c6944ffedd3025605c845c262a5 [32/41] SEP/SOCWATCH resolve build errors after rebasing to linux v5.6-rc3
config: i386-randconfig-s032-20210730 (attached as .config)
compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/mchinth/linux/commit/4a8adda8065c4c6944ffedd3025605c845c262a5
        git remote add mchinth https://github.com/mchinth/linux
        git fetch --no-tags mchinth  sep_socwatch_linux_5_9
        git checkout 4a8adda8065c4c6944ffedd3025605c845c262a5
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/platform/x86/sepdk/sep/

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/platform/x86/sepdk/sep/pci.c:365:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/platform/x86/sepdk/sep/pci.c:417:17: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/platform/x86/sepdk/sep/pci.c:462:16: sparse: sparse: cast removes address space '__iomem' of expression

vim +/__iomem +365 drivers/platform/x86/sepdk/sep/pci.c

   334	
   335	/* ------------------------------------------------------------------------- */
   336	/*!
   337	 * @fn extern int PCI_Read_From_Memory_Address(addr, val)
   338	 *
   339	 * @param    addr    - physical address in mmio
   340	 * @param   *value  - value at this address
   341	 *
   342	 * @return  status
   343	 *
   344	 * @brief   Read memory mapped i/o physical location
   345	 *
   346	 */
   347	int PCI_Read_From_Memory_Address(U32 addr, U32 *val)
   348	{
   349		U32 aligned_addr, offset, value;
   350		PVOID base;
   351	
   352		SEP_DRV_LOG_TRACE_IN("Addr: %x, val_pointer: %p.", addr, val);
   353	
   354		if (addr <= 0) {
   355			SEP_DRV_LOG_ERROR_TRACE_OUT("OS_INVALID (addr <= 0!).");
   356			return OS_INVALID;
   357		}
   358	
   359		SEP_DRV_LOG_TRACE("Preparing to reading physical address: %x.", addr);
   360		offset = addr & ~PAGE_MASK;
   361		aligned_addr = addr & PAGE_MASK;
   362		SEP_DRV_LOG_TRACE("Aligned physical address: %x, offset: %x.",
   363				  aligned_addr, offset);
   364	
 > 365		base = (PVOID)ioremap_cache(aligned_addr, PAGE_SIZE);
   366		if (base == NULL) {
   367			SEP_DRV_LOG_ERROR_TRACE_OUT("OS_INVALID (mapping failed!).");
   368			return OS_INVALID;
   369		}
   370	
   371		SEP_DRV_LOG_REGISTER_IN("Will read PCI address %u (mapped at %p).",
   372					addr, base + offset);
   373		value = readl((void __iomem *)(base + offset));
   374		SEP_DRV_LOG_REGISTER_OUT("Read PCI address %u (mapped at %p): %x.",
   375					 addr, base + offset, value);
   376	
   377		*val = value;
   378	
   379		iounmap((void __iomem *)base);
   380	
   381		SEP_DRV_LOG_TRACE_OUT("OS_SUCCESS.");
   382		return OS_SUCCESS;
   383	}
   384	

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

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