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Date:   Sun, 9 Aug 2020 11:13:59 +0800
From:   kernel test robot <lkp@...el.com>
To:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/char/tpm/tpm_ibmvtpm.c:130:30: sparse: sparse: cast removes
 address space '__iomem' of expression

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   06a81c1c7db9bd5de0bd38cd5acc44bb22b99150
commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces
date:   7 weeks ago
config: powerpc64-randconfig-s032-20200808 (attached as .config)
compiler: powerpc64-linux-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: v0.6.2-118-ge1578773-dirty
        git checkout 670d0a4b10704667765f7d18f7592993d02783aa
        # 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=powerpc64 

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/char/tpm/tpm_ibmvtpm.c:130:30: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/char/tpm/tpm_ibmvtpm.c:131:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void * @@     got void [noderef] __iomem *rtce_buf @@
   drivers/char/tpm/tpm_ibmvtpm.c:131:23: sparse:     expected void *
>> drivers/char/tpm/tpm_ibmvtpm.c:131:23: sparse:     got void [noderef] __iomem *rtce_buf
   drivers/char/tpm/tpm_ibmvtpm.c:234:17: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/char/tpm/tpm_ibmvtpm.c:369:30: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const * @@     got void [noderef] __iomem *rtce_buf @@
   drivers/char/tpm/tpm_ibmvtpm.c:369:30: sparse:     expected void const *
   drivers/char/tpm/tpm_ibmvtpm.c:369:30: sparse:     got void [noderef] __iomem *rtce_buf
>> drivers/char/tpm/tpm_ibmvtpm.c:530:43: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *rtce_buf @@     got void * @@
>> drivers/char/tpm/tpm_ibmvtpm.c:530:43: sparse:     expected void [noderef] __iomem *rtce_buf
   drivers/char/tpm/tpm_ibmvtpm.c:530:43: sparse:     got void *
>> drivers/char/tpm/tpm_ibmvtpm.c:537:52: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void *ptr @@     got void [noderef] __iomem *rtce_buf @@
   drivers/char/tpm/tpm_ibmvtpm.c:537:52: sparse:     expected void *ptr
   drivers/char/tpm/tpm_ibmvtpm.c:537:52: sparse:     got void [noderef] __iomem *rtce_buf
   drivers/char/tpm/tpm_ibmvtpm.c:543:46: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const * @@     got void [noderef] __iomem *rtce_buf @@
   drivers/char/tpm/tpm_ibmvtpm.c:543:46: sparse:     expected void const *
   drivers/char/tpm/tpm_ibmvtpm.c:543:46: sparse:     got void [noderef] __iomem *rtce_buf
--
   drivers/vfio/pci/vfio_pci_nvlink2.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, drivers/vfio/pci/trace.h):
   include/trace/../../drivers/vfio/pci/trace.h:17:1: sparse: sparse: incorrect type in assignment (different base types) @@     expected int ret @@     got restricted vm_fault_t [usertype] ret @@
   include/trace/../../drivers/vfio/pci/trace.h:17:1: sparse:     expected int ret
   include/trace/../../drivers/vfio/pci/trace.h:17:1: sparse:     got restricted vm_fault_t [usertype] ret
>> drivers/vfio/pci/vfio_pci_nvlink2.c:76:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *to @@     got void [noderef] __iomem * @@
   drivers/vfio/pci/vfio_pci_nvlink2.c:76:40: sparse:     expected void *to
>> drivers/vfio/pci/vfio_pci_nvlink2.c:76:40: sparse:     got void [noderef] __iomem *
>> drivers/vfio/pci/vfio_pci_nvlink2.c:81:43: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void const *from @@     got void [noderef] __iomem * @@
   drivers/vfio/pci/vfio_pci_nvlink2.c:81:43: sparse:     expected void const *from
   drivers/vfio/pci/vfio_pci_nvlink2.c:81:43: sparse:     got void [noderef] __iomem *

vim +/__iomem +130 drivers/char/tpm/tpm_ibmvtpm.c

132f7629474424 Ashley Lai        2012-08-22   94  
132f7629474424 Ashley Lai        2012-08-22   95  /**
132f7629474424 Ashley Lai        2012-08-22   96   * tpm_ibmvtpm_recv - Receive data after send
93c12f293f8798 Winkler, Tomas    2016-11-23   97   *
132f7629474424 Ashley Lai        2012-08-22   98   * @chip:	tpm chip struct
132f7629474424 Ashley Lai        2012-08-22   99   * @buf:	buffer to read
93c12f293f8798 Winkler, Tomas    2016-11-23  100   * @count:	size of buffer
132f7629474424 Ashley Lai        2012-08-22  101   *
93c12f293f8798 Winkler, Tomas    2016-11-23  102   * Return:
132f7629474424 Ashley Lai        2012-08-22  103   *	Number of bytes read
132f7629474424 Ashley Lai        2012-08-22  104   */
132f7629474424 Ashley Lai        2012-08-22  105  static int tpm_ibmvtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count)
132f7629474424 Ashley Lai        2012-08-22  106  {
9e0d39d8a6a0a8 Christophe Ricard 2016-03-31  107  	struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
132f7629474424 Ashley Lai        2012-08-22  108  	u16 len;
b5666502700855 Ashley Lai        2012-09-12  109  	int sig;
132f7629474424 Ashley Lai        2012-08-22  110  
132f7629474424 Ashley Lai        2012-08-22  111  	if (!ibmvtpm->rtce_buf) {
132f7629474424 Ashley Lai        2012-08-22  112  		dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n");
132f7629474424 Ashley Lai        2012-08-22  113  		return 0;
132f7629474424 Ashley Lai        2012-08-22  114  	}
132f7629474424 Ashley Lai        2012-08-22  115  
6674ff145eef1f Stefan Berger     2015-12-09  116  	sig = wait_event_interruptible(ibmvtpm->wq, !ibmvtpm->tpm_processing_cmd);
b5666502700855 Ashley Lai        2012-09-12  117  	if (sig)
b5666502700855 Ashley Lai        2012-09-12  118  		return -EINTR;
b5666502700855 Ashley Lai        2012-09-12  119  
b5666502700855 Ashley Lai        2012-09-12  120  	len = ibmvtpm->res_len;
132f7629474424 Ashley Lai        2012-08-22  121  
b5666502700855 Ashley Lai        2012-09-12  122  	if (count < len) {
132f7629474424 Ashley Lai        2012-08-22  123  		dev_err(ibmvtpm->dev,
37ab03414829e5 Jason Gunthorpe   2013-09-14  124  			"Invalid size in recv: count=%zd, crq_size=%d\n",
b5666502700855 Ashley Lai        2012-09-12  125  			count, len);
132f7629474424 Ashley Lai        2012-08-22  126  		return -EIO;
132f7629474424 Ashley Lai        2012-08-22  127  	}
132f7629474424 Ashley Lai        2012-08-22  128  
132f7629474424 Ashley Lai        2012-08-22  129  	spin_lock(&ibmvtpm->rtce_lock);
b5666502700855 Ashley Lai        2012-09-12 @130  	memcpy((void *)buf, (void *)ibmvtpm->rtce_buf, len);
b5666502700855 Ashley Lai        2012-09-12 @131  	memset(ibmvtpm->rtce_buf, 0, len);
b5666502700855 Ashley Lai        2012-09-12  132  	ibmvtpm->res_len = 0;
132f7629474424 Ashley Lai        2012-08-22  133  	spin_unlock(&ibmvtpm->rtce_lock);
132f7629474424 Ashley Lai        2012-08-22  134  	return len;
132f7629474424 Ashley Lai        2012-08-22  135  }
132f7629474424 Ashley Lai        2012-08-22  136  

:::::: The code at line 130 was first introduced by commit
:::::: b5666502700855a1eb1a15482005b22478b9460e drivers/char/tpm: remove tasklet and cleanup

:::::: TO: Ashley Lai <adlai@...ux.vnet.ibm.com>
:::::: CC: Kent Yoder <key@...ux.vnet.ibm.com>

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

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