Hi dave,

[auto build test WARNING on usb/usb-next -- if it's inappropriate base, please 
suggest rules for selecting the more suitable base]

url:    
https://github.com/0day-ci/linux/commits/dave-penkler/USB-usbtmc-Add-support-for-missing-USBTMC-USB488-spec/20151014-211711
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/usb/class/usbtmc.c:476:28: sparse: incorrect type in argument 1 
>> (different address spaces)
   drivers/usb/class/usbtmc.c:476:28:    expected void [noderef] <asn:1>*to
   drivers/usb/class/usbtmc.c:476:28:    got void *<noident>
>> drivers/usb/class/usbtmc.c:507:44: sparse: incorrect type in argument 2 
>> (different address spaces)
   drivers/usb/class/usbtmc.c:507:44:    expected void const [noderef] 
<asn:1>*from
   drivers/usb/class/usbtmc.c:507:44:    got void *<noident>
   drivers/usb/class/usbtmc.c:1248:40: sparse: incorrect type in argument 1 
(different address spaces)
   drivers/usb/class/usbtmc.c:1248:40:    expected void [noderef] <asn:1>*to
   drivers/usb/class/usbtmc.c:1248:40:    got void *<noident>

vim +476 drivers/usb/class/usbtmc.c

   470  
   471          /* bump interrupt bTag */
   472          data->iin_bTag += 1;
   473          if (data->iin_bTag > 127)
   474                  data->iin_bTag = 2;
   475  
 > 476          rv = copy_to_user((void *)arg, &stb, sizeof(stb));
   477          if (rv)
   478                  rv = -EFAULT;
   479  
   480   exit:
   481          kfree(buffer);
   482          return rv;
   483  
   484  }
   485  
   486  static int usbtmc488_ioctl_simple(struct usbtmc_device_data *data,
   487                                  unsigned long arg,
   488                                  unsigned int cmd)
   489  {
   490          u8 *buffer;
   491          struct device *dev;
   492          int rv;
   493          unsigned int val;
   494          u16 wValue;
   495  
   496          dev = &data->intf->dev;
   497  
   498          if (0 == (data->usb488_caps & USBTMC488_CAPABILITY_SIMPLE))
   499                  return -EINVAL;
   500  
   501          buffer = kmalloc(8, GFP_KERNEL);
   502          if (!buffer)
   503                  return -ENOMEM;
   504  
   505  
   506          if (cmd == USBTMC488_REQUEST_REN_CONTROL) {
 > 507                  rv = copy_from_user(&val, (void *)arg, sizeof(val));
   508                  if (rv) {
   509                          rv = -EFAULT;
   510                          goto exit;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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