linux-kernel - Re: [PATCH 2/4] Staging: rtl8712: Use ether_addr

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Date:	Sun, 11 Oct 2015 08:37:53 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Punit Vara <punitvara@...il.com>
Cc:	kbuild-all@...org, Larry.Finger@...inger.net,
	dogukan.ergun@...il.com, florian.c.schilhabel@...glemail.com,
	Punit Vara <punitvara@...il.com>, stillcompiling@...il.com,
	gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, Julia.Lawall@...6.fr,
	sudipm.mukherjee@...il.com, dan.carpenter@...cle.com
Subject: Re: [PATCH 2/4] Staging: rtl8712: Use ether_addr_equal() over
 memcmp()

Hi Punit,

[auto build test WARNING on v4.3-rc4 -- if it's inappropriate base, please ignore]

reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

   drivers/staging/rtl8712/rtl871x_ioctl_linux.c:227:15: sparse: cast to restricted __le16
>> drivers/staging/rtl8712/rtl871x_ioctl_linux.c:2010:54: sparse: incorrect type in argument 2 (different base types)
   drivers/staging/rtl8712/rtl871x_ioctl_linux.c:2010:54:    expected unsigned char const [usertype] *addr2
   drivers/staging/rtl8712/rtl871x_ioctl_linux.c:2010:54:    got struct wlan_bssid_ex network
   drivers/staging/rtl8712/rtl871x_ioctl_linux.c: In function 'r871x_get_ap_info':
   drivers/staging/rtl8712/rtl871x_ioctl_linux.c:2010:32: error: incompatible type for argument 2 of 'ether_addr_equal'
      if (!ether_addr_equal(bssid, pnetwork->network)) {
                                   ^
   In file included from drivers/staging/rtl8712/osdep_service.h:39:0,
                    from drivers/staging/rtl8712/rtl871x_ioctl_linux.c:32:
   include/linux/etherdevice.h:310:20: note: expected 'const u8 * {aka const unsigned char *}' but argument is of type 'struct wlan_bssid_ex'
    static inline bool ether_addr_equal(const u8 *addr1, const u8 *addr2)
                       ^

vim +2010 drivers/staging/rtl8712/rtl871x_ioctl_linux.c

  1994			 return -EINVAL;
  1995		spin_lock_irqsave(&(pmlmepriv->scanned_queue.lock), irqL);
  1996		phead = &queue->queue;
  1997		plist = phead->next;
  1998		while (1) {
  1999			if (end_of_queue_search(phead, plist) == true)
  2000				break;
  2001			pnetwork = LIST_CONTAINOR(plist, struct wlan_network, list);
  2002			if (hwaddr_aton_i(data, bssid)) {
  2003				netdev_info(dev, "r8712u: Invalid BSSID '%s'.\n",
  2004					    (u8 *)data);
  2005				spin_unlock_irqrestore(&(pmlmepriv->scanned_queue.lock),
  2006						       irqL);
  2007				return -EINVAL;
  2008			}
  2009			netdev_info(dev, "r8712u: BSSID:%pM\n", bssid);
> 2010			if (!ether_addr_equal(bssid, pnetwork->network)) {
  2011				/* BSSID match, then check if supporting wpa/wpa2 */
  2012				pbuf = r8712_get_wpa_ie(&pnetwork->network.IEs[12],
  2013				       &wpa_ielen, pnetwork->network.IELength-12);
  2014				if (pbuf && (wpa_ielen > 0)) {
  2015					pdata->flags = 1;
  2016					break;
  2017				}
  2018				pbuf = r8712_get_wpa2_ie(&pnetwork->network.IEs[12],

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