Return-Path: From: Johan Hedberg To: linux-bluetooth@vger.kernel.org Subject: [PATCH v4 05/26] Bluetooth: Fix UUID/class mgmt command response synchronization Date: Wed, 13 Mar 2013 11:11:56 -0700 Message-Id: <1363198337-3896-6-git-send-email-johan.hedberg@gmail.com> In-Reply-To: <1363198337-3896-1-git-send-email-johan.hedberg@gmail.com> References: <1363198337-3896-1-git-send-email-johan.hedberg@gmail.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: From: Johan Hedberg We should only return a mgmt command complete once all HCI commands to a mgmt_set_dev_class or mgmt_add/remove_uuid command have completed. This patch fixes the issue by having a proper async request complete callback for these actions and responding to user space in the callback. Signed-off-by: Johan Hedberg --- net/bluetooth/mgmt.c | 73 ++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 56 insertions(+), 17 deletions(-) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 367837d..8a0bbb9 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -1378,6 +1378,32 @@ static u8 get_uuid_size(const u8 *uuid) return 16; } +static void mgmt_class_complete(struct hci_dev *hdev, u16 mgmt_op, u8 status) +{ + struct pending_cmd *cmd; + + hci_dev_lock(hdev); + + cmd = mgmt_pending_find(mgmt_op, hdev); + if (!cmd) + goto unlock; + + cmd_complete(cmd->sk, cmd->index, cmd->opcode, mgmt_status(status), + hdev->dev_class, 3); + + mgmt_pending_remove(cmd); + +unlock: + hci_dev_unlock(hdev); +} + +static void add_uuid_complete(struct hci_dev *hdev, u8 status) +{ + BT_DBG("status 0x%02x", status); + + mgmt_class_complete(hdev, MGMT_OP_ADD_UUID, status); +} + static int add_uuid(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) { struct mgmt_cp_add_uuid *cp = data; @@ -1413,9 +1439,11 @@ static int add_uuid(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) update_class(&req); update_eir(&req); - hci_req_run(&req, NULL); + err = hci_req_run(&req, add_uuid_complete); + if (err < 0) { + if (err != -ENODATA) + goto failed; - if (!test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) { err = cmd_complete(sk, hdev->id, MGMT_OP_ADD_UUID, 0, hdev->dev_class, 3); goto failed; @@ -1448,6 +1476,13 @@ static bool enable_service_cache(struct hci_dev *hdev) return false; } +static void remove_uuid_complete(struct hci_dev *hdev, u8 status) +{ + BT_DBG("status 0x%02x", status); + + mgmt_class_complete(hdev, MGMT_OP_REMOVE_UUID, status); +} + static int remove_uuid(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) { @@ -1503,9 +1538,11 @@ update_class: update_class(&req); update_eir(&req); - hci_req_run(&req, NULL); + err = hci_req_run(&req, remove_uuid_complete); + if (err < 0) { + if (err != -ENODATA) + goto unlock; - if (!test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) { err = cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_UUID, 0, hdev->dev_class, 3); goto unlock; @@ -1524,6 +1561,13 @@ unlock: return err; } +static void set_class_complete(struct hci_dev *hdev, u8 status) +{ + BT_DBG("status 0x%02x", status); + + mgmt_class_complete(hdev, MGMT_OP_SET_DEV_CLASS, status); +} + static int set_dev_class(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) { @@ -1572,9 +1616,11 @@ static int set_dev_class(struct sock *sk, struct hci_dev *hdev, void *data, update_class(&req); - hci_req_run(&req, NULL); + err = hci_req_run(&req, set_class_complete); + if (err < 0) { + if (err != -ENODATA) + goto unlock; - if (!test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) { err = cmd_complete(sk, hdev->id, MGMT_OP_SET_DEV_CLASS, 0, hdev->dev_class, 3); goto unlock; @@ -3700,21 +3746,14 @@ int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status) return err; } -static void class_rsp(struct pending_cmd *cmd, void *data) +static void sk_lookup(struct pending_cmd *cmd, void *data) { struct cmd_lookup *match = data; - cmd_complete(cmd->sk, cmd->index, cmd->opcode, match->mgmt_status, - match->hdev->dev_class, 3); - - list_del(&cmd->list); - if (match->sk == NULL) { match->sk = cmd->sk; sock_hold(match->sk); } - - mgmt_pending_free(cmd); } int mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class, @@ -3725,9 +3764,9 @@ int mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class, clear_bit(HCI_PENDING_CLASS, &hdev->dev_flags); - mgmt_pending_foreach(MGMT_OP_SET_DEV_CLASS, hdev, class_rsp, &match); - mgmt_pending_foreach(MGMT_OP_ADD_UUID, hdev, class_rsp, &match); - mgmt_pending_foreach(MGMT_OP_REMOVE_UUID, hdev, class_rsp, &match); + mgmt_pending_foreach(MGMT_OP_SET_DEV_CLASS, hdev, sk_lookup, &match); + mgmt_pending_foreach(MGMT_OP_ADD_UUID, hdev, sk_lookup, &match); + mgmt_pending_foreach(MGMT_OP_REMOVE_UUID, hdev, sk_lookup, &match); if (!status) err = mgmt_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev, dev_class, -- 1.7.10.4