Re: [PATCH net-next v3] cdc_ether: Improve ZTE MF823/831/910 handling

From: kbuild test robot
Date: Fri Jul 22 2016 - 22:26:48 EST


Hi,

[auto build test WARNING on net-next/master]

url: https://github.com/0day-ci/linux/commits/Kristian-Evensen/cdc_ether-Improve-ZTE-MF823-831-910-handling/20160723-093100
config: x86_64-randconfig-i0-201629 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.3-14) 4.9.3
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All warnings (new ones prefixed by >>):

drivers/net/usb/cdc_ether.c: In function 'usbnet_cdc_zte_rx_fixup':
>> drivers/net/usb/cdc_ether.c:461:5: warning: unused variable 'buggy_hwaddrs_idx' [-Wunused-variable]
u8 buggy_hwaddrs_idx = 0;
^
>> drivers/net/usb/cdc_ether.c:460:5: warning: unused variable 'num_buggy_hwaddrs' [-Wunused-variable]
u8 num_buggy_hwaddrs;
^

vim +/buggy_hwaddrs_idx +461 drivers/net/usb/cdc_ether.c

454 * device sends packets with a static, bogus, random MAC address (event if
455 * device MAC address has been updated). Always set MAC address to that of the
456 * device.
457 */
458 static int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
459 {
> 460 u8 num_buggy_hwaddrs;
> 461 u8 buggy_hwaddrs_idx = 0;
462
463 if (skb->len < ETH_HLEN || !(skb->data[0] & 0x02))
464 return 1;

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