Re: [PATCH] Bluetooth: msft: Extended monitor tracking by address filter

[kernel test robot]

Hi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on bluetooth/master]
[also build test WARNING on bluetooth-next/master net-next/main net/main linus/master v6.3-rc2 next-20230316]
[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/hildawu-realtek-com/Bluetooth-msft-Extended-monitor-tracking-by-address-filter/20230316-170950
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git master
patch link:    https://lore.kernel.org/r/20230316090729.14572-1-hildawu%40realtek.com
patch subject: [PATCH] Bluetooth: msft: Extended monitor tracking by address filter
config: i386-randconfig-a016-20230313 (https://download.01.org/0day-ci/archive/20230317/202303170056.UsZ6RDV4-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/cee47af4605a9e5cba61be1ab1d92e8748d92e1e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review hildawu-realtek-com/Bluetooth-msft-Extended-monitor-tracking-by-address-filter/20230316-170950
        git checkout cee47af4605a9e5cba61be1ab1d92e8748d92e1e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash net/bluetooth/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202303170056.UsZ6RDV4-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> net/bluetooth/msft.c:521:43: warning: variable 'rp' set but not used [-Wunused-but-set-variable]
           struct msft_rp_le_monitor_advertisement *rp;
                                                    ^
   1 warning generated.


vim +/rp +521 net/bluetooth/msft.c

   507	
   508	static int msft_add_monitor_sync(struct hci_dev *hdev,
   509					 struct adv_monitor *monitor)
   510	{
   511		struct msft_cp_le_monitor_advertisement *cp;
   512		struct msft_le_monitor_advertisement_pattern_data *pattern_data;
   513		struct msft_le_monitor_advertisement_pattern *pattern;
   514		struct adv_pattern *entry;
   515		size_t total_size = sizeof(*cp) + sizeof(*pattern_data);
   516		ptrdiff_t offset = 0;
   517		u8 pattern_count = 0;
   518		struct sk_buff *skb;
   519		int err;
   520		struct msft_monitor_advertisement_handle_data *handle_data;
 > 521		struct msft_rp_le_monitor_advertisement *rp;
   522	
   523		if (!msft_monitor_pattern_valid(monitor))
   524			return -EINVAL;
   525	
   526		list_for_each_entry(entry, &monitor->patterns, list) {
   527			pattern_count++;
   528			total_size += sizeof(*pattern) + entry->length;
   529		}
   530	
   531		cp = kmalloc(total_size, GFP_KERNEL);
   532		if (!cp)
   533			return -ENOMEM;
   534	
   535		cp->sub_opcode = MSFT_OP_LE_MONITOR_ADVERTISEMENT;
   536		cp->rssi_high = monitor->rssi.high_threshold;
   537		cp->rssi_low = monitor->rssi.low_threshold;
   538		cp->rssi_low_interval = (u8)monitor->rssi.low_threshold_timeout;
   539		cp->rssi_sampling_period = monitor->rssi.sampling_period;
   540	
   541		cp->cond_type = MSFT_MONITOR_ADVERTISEMENT_TYPE_PATTERN;
   542	
   543		pattern_data = (void *)cp->data;
   544		pattern_data->count = pattern_count;
   545	
   546		list_for_each_entry(entry, &monitor->patterns, list) {
   547			pattern = (void *)(pattern_data->data + offset);
   548			/* the length also includes data_type and offset */
   549			pattern->length = entry->length + 2;
   550			pattern->data_type = entry->ad_type;
   551			pattern->start_byte = entry->offset;
   552			memcpy(pattern->pattern, entry->value, entry->length);
   553			offset += sizeof(*pattern) + entry->length;
   554		}
   555	
   556		skb = __hci_cmd_sync(hdev, hdev->msft_opcode, total_size, cp,
   557				     HCI_CMD_TIMEOUT);
   558	
   559		if (IS_ERR_OR_NULL(skb)) {
   560			kfree(cp);
   561			return PTR_ERR(skb);
   562		}
   563	
   564		err = msft_le_monitor_advertisement_cb(hdev, hdev->msft_opcode,
   565						       monitor, skb);
   566		if (!err) {
   567			rp = (struct msft_rp_le_monitor_advertisement *)skb->data;
   568			handle_data = msft_find_handle_data(hdev, monitor->handle,
   569							    true);
   570			if (handle_data) {
   571				handle_data->rssi_high   = cp->rssi_high;
   572				handle_data->rssi_low    = cp->rssi_low;
   573				handle_data->rssi_low_interval    =
   574							cp->rssi_low_interval;
   575				handle_data->rssi_sampling_period =
   576							cp->rssi_sampling_period;
   577			}
   578		}
   579		kfree(cp);
   580	
   581		return err;
   582	}
   583	

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https://github.com/intel/lkp-tests