Re: [PATCH v3 3/4] gnss: Add driver for AI2 protocol

[kernel test robot]

Hi Andreas,

kernel test robot noticed the following build errors:

[auto build test ERROR on bluetooth/master]
[also build test ERROR on bluetooth-next/master char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus linus/master v6.10-rc2 next-20240603]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Andreas-Kemnade/gnss-Add-AI2-protocol-used-by-some-TI-combo-chips/20240603-224753
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git master
patch link:    https://lore.kernel.org/r/20240603144400.2195564-4-andreas%40kemnade.info
patch subject: [PATCH v3 3/4] gnss: Add driver for AI2 protocol
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20240604/202406040854.fSEvlFam-lkp@xxxxxxxxx/config)
compiler: alpha-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240604/202406040854.fSEvlFam-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406040854.fSEvlFam-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   drivers/gnss/ai2.c: In function 'process_ai2_frame':
>> drivers/gnss/ai2.c:340:13: error: implicit declaration of function 'get_unaligned_le16' [-Werror=implicit-function-declaration]
     340 |         if (get_unaligned_le16(data + i) != sum) {
         |             ^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/get_unaligned_le16 +340 drivers/gnss/ai2.c

   324	
   325	/* do some sanity checks and split frame into packets */
   326	static void process_ai2_frame(struct ai2_device *ai2dev)
   327	{
   328		u16 sum;
   329		int i;
   330		u8 *head;
   331		u8 *data;
   332	
   333		sum = 0;
   334		data = ai2dev->recv_skb->data;
   335		for (i = 0; i < ai2dev->recv_skb->len - 2; i++)
   336			sum += data[i];
   337	
   338		print_hex_dump_bytes("ai2 frame: ", DUMP_PREFIX_OFFSET, data, ai2dev->recv_skb->len);
   339	
 > 340		if (get_unaligned_le16(data + i) != sum) {
   341			dev_dbg(ai2dev->dev,
   342				"checksum error in reception, dropping frame\n");
   343			return;
   344		}
   345	
   346		/* reached if byte 1 in the command packet is set to 1 */
   347		if (data[1] == AI2_ACK)
   348			return;
   349	
   350		head = skb_pull(ai2dev->recv_skb, 2); /* drop frame start marker */
   351		while (head && (ai2dev->recv_skb->len >= 3)) {
   352			u8 cmd;
   353			u16 pktlen;
   354	
   355			cmd = head[0];
   356			pktlen = get_unaligned_le16(head + 1);
   357			data = skb_pull(ai2dev->recv_skb, 3);
   358			if (!data)
   359				break;
   360	
   361			if (pktlen > ai2dev->recv_skb->len)
   362				break;
   363	
   364			head = skb_pull(ai2dev->recv_skb, pktlen);
   365	
   366			process_ai2_packet(ai2dev, cmd, data, pktlen);
   367		}
   368	}
   369	

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