From 21a60d307ddc2180cfa542a995d943d1034cf5c5 Mon Sep 17 00:00:00 2001 From: Johan Hedberg Date: Tue, 10 Jun 2014 14:05:58 +0300 Subject: [PATCH] Bluetooth: Refactor discovery stopping into its own function We'll need to reuse the same logic for stopping discovery also when cleaning up HCI state when powering off. This patch refactors the code out to its own function that can later (in a subsequent patch) be used also for the power off case. Signed-off-by: Johan Hedberg Signed-off-by: Marcel Holtmann Cc: stable@vger.kernel.org --- net/bluetooth/mgmt.c | 93 +++++++++++++++++++++++--------------------- 1 file changed, 49 insertions(+), 44 deletions(-) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 0fce54412ffd..be6f03219121 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -1047,6 +1047,43 @@ static void clean_up_hci_complete(struct hci_dev *hdev, u8 status) } } +static void hci_stop_discovery(struct hci_request *req) +{ + struct hci_dev *hdev = req->hdev; + struct hci_cp_remote_name_req_cancel cp; + struct inquiry_entry *e; + + switch (hdev->discovery.state) { + case DISCOVERY_FINDING: + if (test_bit(HCI_INQUIRY, &hdev->flags)) { + hci_req_add(req, HCI_OP_INQUIRY_CANCEL, 0, NULL); + } else { + cancel_delayed_work(&hdev->le_scan_disable); + hci_req_add_le_scan_disable(req); + } + + break; + + case DISCOVERY_RESOLVING: + e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, + NAME_PENDING); + if (!e) + return; + + bacpy(&cp.bdaddr, &e->data.bdaddr); + hci_req_add(req, HCI_OP_REMOTE_NAME_REQ_CANCEL, sizeof(cp), + &cp); + + break; + + default: + /* Passive scanning */ + if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) + hci_req_add_le_scan_disable(req); + break; + } +} + static int clean_up_hci_state(struct hci_dev *hdev) { struct hci_request req; @@ -3574,8 +3611,6 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data, { struct mgmt_cp_stop_discovery *mgmt_cp = data; struct pending_cmd *cmd; - struct hci_cp_remote_name_req_cancel cp; - struct inquiry_entry *e; struct hci_request req; int err; @@ -3605,52 +3640,22 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data, hci_req_init(&req, hdev); - switch (hdev->discovery.state) { - case DISCOVERY_FINDING: - if (test_bit(HCI_INQUIRY, &hdev->flags)) { - hci_req_add(&req, HCI_OP_INQUIRY_CANCEL, 0, NULL); - } else { - cancel_delayed_work(&hdev->le_scan_disable); - - hci_req_add_le_scan_disable(&req); - } - - break; - - case DISCOVERY_RESOLVING: - e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, - NAME_PENDING); - if (!e) { - mgmt_pending_remove(cmd); - err = cmd_complete(sk, hdev->id, - MGMT_OP_STOP_DISCOVERY, 0, - &mgmt_cp->type, - sizeof(mgmt_cp->type)); - hci_discovery_set_state(hdev, DISCOVERY_STOPPED); - goto unlock; - } - - bacpy(&cp.bdaddr, &e->data.bdaddr); - hci_req_add(&req, HCI_OP_REMOTE_NAME_REQ_CANCEL, sizeof(cp), - &cp); + hci_stop_discovery(&req); - break; - - default: - BT_DBG("unknown discovery state %u", hdev->discovery.state); - - mgmt_pending_remove(cmd); - err = cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY, - MGMT_STATUS_FAILED, &mgmt_cp->type, - sizeof(mgmt_cp->type)); + err = hci_req_run(&req, stop_discovery_complete); + if (!err) { + hci_discovery_set_state(hdev, DISCOVERY_STOPPING); goto unlock; } - err = hci_req_run(&req, stop_discovery_complete); - if (err < 0) - mgmt_pending_remove(cmd); - else - hci_discovery_set_state(hdev, DISCOVERY_STOPPING); + mgmt_pending_remove(cmd); + + /* If no HCI commands were sent we're done */ + if (err == -ENODATA) { + err = cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY, 0, + &mgmt_cp->type, sizeof(mgmt_cp->type)); + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + } unlock: hci_dev_unlock(hdev); -- 2.34.1