linux-kernel - drivers/net/wireless/intel/iwlwifi/mei/net.c:400: undefined reference to `ieee80211

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Date:   Mon, 14 Mar 2022 11:31:03 +0800
From:   kernel test robot <lkp@...el.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Johannes Berg <johannes.berg@...el.com>
Subject: drivers/net/wireless/intel/iwlwifi/mei/net.c:400: undefined
 reference to `ieee80211_hdrlen'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   09688c0166e76ce2fb85e86b9d99be8b0084cdf9
commit: 875ad06015329314c594d3302ac2bbea37774543 iwlwifi: fix build error for IWLMEI
date:   11 days ago
config: i386-randconfig-a001-20220314 (https://download.01.org/0day-ci/archive/20220314/202203141142.6EHviCS0-lkp@intel.com/config)
compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04) 9.4.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=875ad06015329314c594d3302ac2bbea37774543
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 875ad06015329314c594d3302ac2bbea37774543
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   ld: drivers/net/wireless/intel/iwlwifi/mei/net.o: in function `iwl_mei_tx_copy_to_csme':
>> drivers/net/wireless/intel/iwlwifi/mei/net.c:400: undefined reference to `ieee80211_hdrlen'


vim +400 drivers/net/wireless/intel/iwlwifi/mei/net.c

2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  364  
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  365  #define DHCP_SERVER_PORT 67
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  366  #define DHCP_CLIENT_PORT 68
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  367  void iwl_mei_tx_copy_to_csme(struct sk_buff *origskb, unsigned int ivlen)
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  368  {
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  369  	struct ieee80211_hdr *hdr;
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  370  	struct sk_buff *skb;
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  371  	struct ethhdr ethhdr;
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  372  	struct ethhdr *eth;
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  373  
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  374  	/* Catch DHCP packets */
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  375  	if (origskb->protocol != htons(ETH_P_IP) ||
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  376  	    ip_hdr(origskb)->protocol != IPPROTO_UDP ||
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  377  	    udp_hdr(origskb)->source != htons(DHCP_CLIENT_PORT) ||
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  378  	    udp_hdr(origskb)->dest != htons(DHCP_SERVER_PORT))
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  379  		return;
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  380  
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  381  	/*
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  382  	 * We could be a bit less aggressive here and not copy everything, but
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  383  	 * this is very rare anyway, do don't bother much.
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  384  	 */
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  385  	skb = skb_copy(origskb, GFP_ATOMIC);
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  386  	if (!skb)
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  387  		return;
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  388  
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  389  	skb->protocol = origskb->protocol;
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  390  
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  391  	hdr = (void *)skb->data;
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  392  
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  393  	memcpy(ethhdr.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  394  	memcpy(ethhdr.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  395  
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  396  	/*
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  397  	 * Remove the ieee80211 header + IV + SNAP but leave the ethertype
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  398  	 * We still have enough headroom for the sap header.
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12  399  	 */
2da4366f9e2c44 Emmanuel Grumbach 2021-11-12 @400  	pskb_pull(skb, ieee80211_hdrlen(hdr->frame_control) + ivlen + 6);

:::::: The code at line 400 was first introduced by commit
:::::: 2da4366f9e2c44afedec4acad65a99a3c7da1a35 iwlwifi: mei: add the driver to allow cooperation with CSME

:::::: TO: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
:::::: CC: Kalle Valo <kvalo@...eaurora.org>

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