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Subject[kbuild] Re: [PATCH v9 1/3] bluetooth: msft: Handle MSFT Monitor Device Event
Hi Manish,

url: https://github.com/0day-ci/linux/commits/Manish-Mandlik/bluetooth-msft-Handle-MSFT-Monitor-Device-Event/20211216-205227
base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master
config: i386-randconfig-m021-20211216 (https://download.01.org/0day-ci/archive/20211217/202112171439.KaggScQN-lkp@intel.com/config )
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

smatch warnings:
net/bluetooth/msft.c:757 msft_vendor_evt() warn: inconsistent returns '&hdev->lock'.

vim +757 net/bluetooth/msft.c

3e54c5890c87a30 Luiz Augusto von Dentz 2021-12-01 714 void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb)
145373cb1b1fcdb Miao-chen Chou 2020-04-03 715 {
145373cb1b1fcdb Miao-chen Chou 2020-04-03 716 struct msft_data *msft = hdev->msft_data;
e5af6a85decc8c1 Manish Mandlik 2021-12-16 717 u8 *evt_prefix;
e5af6a85decc8c1 Manish Mandlik 2021-12-16 718 u8 *evt;
145373cb1b1fcdb Miao-chen Chou 2020-04-03 719
145373cb1b1fcdb Miao-chen Chou 2020-04-03 720 if (!msft)
145373cb1b1fcdb Miao-chen Chou 2020-04-03 721 return;
145373cb1b1fcdb Miao-chen Chou 2020-04-03 722
145373cb1b1fcdb Miao-chen Chou 2020-04-03 723 /* When the extension has defined an event prefix, check that it
145373cb1b1fcdb Miao-chen Chou 2020-04-03 724 * matches, and otherwise just return.
145373cb1b1fcdb Miao-chen Chou 2020-04-03 725 */
145373cb1b1fcdb Miao-chen Chou 2020-04-03 726 if (msft->evt_prefix_len > 0) {
e5af6a85decc8c1 Manish Mandlik 2021-12-16 727 evt_prefix = msft_skb_pull(hdev, skb, 0, msft->evt_prefix_len);
e5af6a85decc8c1 Manish Mandlik 2021-12-16 728 if (!evt_prefix)
145373cb1b1fcdb Miao-chen Chou 2020-04-03 729 return;
145373cb1b1fcdb Miao-chen Chou 2020-04-03 730
e5af6a85decc8c1 Manish Mandlik 2021-12-16 731 if (memcmp(evt_prefix, msft->evt_prefix, msft->evt_prefix_len))
145373cb1b1fcdb Miao-chen Chou 2020-04-03 732 return;
145373cb1b1fcdb Miao-chen Chou 2020-04-03 733 }
145373cb1b1fcdb Miao-chen Chou 2020-04-03 734
145373cb1b1fcdb Miao-chen Chou 2020-04-03 735 /* Every event starts at least with an event code and the rest of
145373cb1b1fcdb Miao-chen Chou 2020-04-03 736 * the data is variable and depends on the event code.
145373cb1b1fcdb Miao-chen Chou 2020-04-03 737 */
145373cb1b1fcdb Miao-chen Chou 2020-04-03 738 if (skb->len < 1)
145373cb1b1fcdb Miao-chen Chou 2020-04-03 739 return;
145373cb1b1fcdb Miao-chen Chou 2020-04-03 740
e5af6a85decc8c1 Manish Mandlik 2021-12-16 741 hci_dev_lock(hdev);
145373cb1b1fcdb Miao-chen Chou 2020-04-03 742
e5af6a85decc8c1 Manish Mandlik 2021-12-16 743 evt = msft_skb_pull(hdev, skb, 0, sizeof(*evt));
e5af6a85decc8c1 Manish Mandlik 2021-12-16 744 if (!evt)
e5af6a85decc8c1 Manish Mandlik 2021-12-16 745 return;

Missing hci_dev_unlock(hdev);

e5af6a85decc8c1 Manish Mandlik 2021-12-16 746
e5af6a85decc8c1 Manish Mandlik 2021-12-16 747 switch (*evt) {
e5af6a85decc8c1 Manish Mandlik 2021-12-16 748 case MSFT_EV_LE_MONITOR_DEVICE:
e5af6a85decc8c1 Manish Mandlik 2021-12-16 749 msft_monitor_device_evt(hdev, skb);
e5af6a85decc8c1 Manish Mandlik 2021-12-16 750 break;
e5af6a85decc8c1 Manish Mandlik 2021-12-16 751
e5af6a85decc8c1 Manish Mandlik 2021-12-16 752 default:
e5af6a85decc8c1 Manish Mandlik 2021-12-16 753 bt_dev_dbg(hdev, "MSFT vendor event 0x%02x", *evt);
e5af6a85decc8c1 Manish Mandlik 2021-12-16 754 break;
e5af6a85decc8c1 Manish Mandlik 2021-12-16 755 }
e5af6a85decc8c1 Manish Mandlik 2021-12-16 756
e5af6a85decc8c1 Manish Mandlik 2021-12-16 @757 hci_dev_unlock(hdev);
145373cb1b1fcdb Miao-chen Chou 2020-04-03 758 }

---
0-DAY CI Kernel Test Service, Intel Corporation
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