Return-Path: From: Andre Guedes To: linux-bluetooth@vger.kernel.org Subject: [PATCH v4 01/14] Bluetooth: Periodic Inquiry and mgmt discovering event Date: Mon, 19 Sep 2011 18:35:23 -0300 Message-Id: <1316468136-12472-2-git-send-email-andre.guedes@openbossa.org> In-Reply-To: <1316468136-12472-1-git-send-email-andre.guedes@openbossa.org> References: <1316468136-12472-1-git-send-email-andre.guedes@openbossa.org> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: By using periodic inquiry command we're not able to detect correctly when the controller has started inquiry. Today we have this workaround in inquiry result event handler to set the HCI_INQUIRY flag when it sees the first inquiry result event. This workaround isn't enough because the device may be performing an inquiry but the HCI_INQUIRY flag is not set. For instance, if there is no device in range, no inquiry result event is generated, consequently, the HCI_INQUIRY flags isn't set when it should so. We rely on HCI_INQUIRY flag to implement the discovery procedure properly. So, as we aren't able to clear/set the HCI_INQUIRY flag in a reliable manner, periodic inquiry events shouldn't change the HCI_INQUIRY flag. In future, if needed, we might add a new flag (e.g. HCI_PINQUIRY) to know if the controller is performing periodic inquiry. Thus, due to that issue and in order to keep compatibility with userspace, periodic inquiry events shouldn't send mgmt discovering events. Signed-off-by: Andre Guedes --- net/bluetooth/hci_event.c | 43 +++++++++++-------------------------------- 1 files changed, 11 insertions(+), 32 deletions(-) diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 35083f2..89faf48 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -58,9 +58,9 @@ static void hci_cc_inquiry_cancel(struct hci_dev *hdev, struct sk_buff *skb) if (status) return; - if (test_and_clear_bit(HCI_INQUIRY, &hdev->flags) && - test_bit(HCI_MGMT, &hdev->flags)) - mgmt_discovering(hdev->id, 0); + clear_bit(HCI_INQUIRY, &hdev->flags); + + mgmt_discovering(hdev->id, 0); hci_req_complete(hdev, HCI_OP_INQUIRY_CANCEL, status); @@ -76,10 +76,6 @@ static void hci_cc_exit_periodic_inq(struct hci_dev *hdev, struct sk_buff *skb) if (status) return; - if (test_and_clear_bit(HCI_INQUIRY, &hdev->flags) && - test_bit(HCI_MGMT, &hdev->flags)) - mgmt_discovering(hdev->id, 0); - hci_conn_check_pending(hdev); } @@ -958,9 +954,9 @@ static inline void hci_cs_inquiry(struct hci_dev *hdev, __u8 status) return; } - if (!test_and_set_bit(HCI_INQUIRY, &hdev->flags) && - test_bit(HCI_MGMT, &hdev->flags)) - mgmt_discovering(hdev->id, 1); + set_bit(HCI_INQUIRY, &hdev->flags); + + mgmt_discovering(hdev->id, 1); } static inline void hci_cs_create_conn(struct hci_dev *hdev, __u8 status) @@ -1339,13 +1335,14 @@ static inline void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff BT_DBG("%s status %d", hdev->name, status); - if (test_and_clear_bit(HCI_INQUIRY, &hdev->flags) && - test_bit(HCI_MGMT, &hdev->flags)) - mgmt_discovering(hdev->id, 0); - hci_req_complete(hdev, HCI_OP_INQUIRY, status); hci_conn_check_pending(hdev); + + if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags)) + return; + + mgmt_discovering(hdev->id, 0); } static inline void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *skb) @@ -1361,12 +1358,6 @@ static inline void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff * hci_dev_lock(hdev); - if (!test_and_set_bit(HCI_INQUIRY, &hdev->flags)) { - - if (test_bit(HCI_MGMT, &hdev->flags)) - mgmt_discovering(hdev->id, 1); - } - for (; num_rsp; num_rsp--, info++) { bacpy(&data.bdaddr, &info->bdaddr); data.pscan_rep_mode = info->pscan_rep_mode; @@ -2359,12 +2350,6 @@ static inline void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, struct hci_dev_lock(hdev); - if (!test_and_set_bit(HCI_INQUIRY, &hdev->flags)) { - - if (test_bit(HCI_MGMT, &hdev->flags)) - mgmt_discovering(hdev->id, 1); - } - if ((skb->len - 1) / num_rsp != sizeof(struct inquiry_info_with_rssi)) { struct inquiry_info_with_rssi_and_pscan_mode *info; info = (void *) (skb->data + 1); @@ -2527,12 +2512,6 @@ static inline void hci_extended_inquiry_result_evt(struct hci_dev *hdev, struct if (!num_rsp) return; - if (!test_and_set_bit(HCI_INQUIRY, &hdev->flags)) { - - if (test_bit(HCI_MGMT, &hdev->flags)) - mgmt_discovering(hdev->id, 1); - } - hci_dev_lock(hdev); for (; num_rsp; num_rsp--, info++) { -- 1.7.5.2