In order to have a better HCI error handling in interleaved discovery
functionality, we should use the HCI request framework.
This patch updates le_scan_disable_work function so it uses the
HCI request framework instead of the hci_send_cmd helper. A complete
callback is registered (le_scan_disable_work_complete function) so we
are able to trigger the inquiry procedure (if we are running the
interleaved discovery) or to stop the discovery procedure (if we are
running LE-only discovery).
This patch also removes the extra logic in hci_cc_le_set_scan_enable
to trigger the inquiry procedure and the mgmt_interleaved_discovery
function since they become useless.
Signed-off-by: Andre Guedes <andre.guedes@xxxxxxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 1 -
net/bluetooth/hci_core.c | 65 +++++++++++++++++++++++++++++++++++++++-
net/bluetooth/hci_event.c | 10 -------
net/bluetooth/mgmt.c | 17 -----------
4 files changed, 64 insertions(+), 29 deletions(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index fbfa5cd..99dded9 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1182,7 +1182,6 @@ int mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
int mgmt_start_discovery_failed(struct hci_dev *hdev, u8 status);
int mgmt_stop_discovery_failed(struct hci_dev *hdev, u8 status);
int mgmt_discovering(struct hci_dev *hdev, u8 discovering);
-int mgmt_interleaved_discovery(struct hci_dev *hdev);
int mgmt_device_blocked(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
int mgmt_device_unblocked(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
bool mgmt_valid_hdev(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 8aefd17..d2b96bd 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2058,17 +2058,80 @@ int hci_cancel_le_scan(struct hci_dev *hdev)
return 0;
}
+static void inquiry_complete(struct hci_dev *hdev, u8 status)
+{
+ if (status) {
+ BT_ERR("Failed to start inquiry: status %d", status);
+
+ hci_dev_lock(hdev);
+ hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+ hci_dev_unlock(hdev);
+ return;
+ }
+}
+
+static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
+{
+ /* General inquiry access code (GIAC) */
+ u8 lap[3] = { 0x33, 0x8b, 0x9e };
+ struct hci_request req;
+ struct hci_cp_inquiry cp;
+ int err;
+
+ if (status) {
+ BT_ERR("Failed to disable LE scanning: status %d", status);
+ return;
+ }
+
+ switch (hdev->discovery.type) {
+ case DISCOV_TYPE_LE:
+ hci_dev_lock(hdev);
+ hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+ hci_dev_unlock(hdev);
+ break;
+
+ case DISCOV_TYPE_INTERLEAVED:
+ hci_dev_lock(hdev);
+ hci_inquiry_cache_flush(hdev);
+ hci_dev_unlock(hdev);
+
+ hci_req_init(&req, hdev);
+
+ memset(&cp, 0, sizeof(cp));
+ memcpy(&cp.lap, lap, sizeof(cp.lap));
+ cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
+ hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
+
+ err = hci_req_run(&req, inquiry_complete);
+ if (err) {
+ BT_ERR("Inquiry request failed: err %d", err);
+ hci_dev_lock(hdev);
+ hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+ hci_dev_unlock(hdev);
+ }
+ break;
+ }
+}
+
static void le_scan_disable_work(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev,
le_scan_disable.work);
struct hci_cp_le_set_scan_enable cp;
+ struct hci_request req;
+ int err;
BT_DBG("%s", hdev->name);
+ hci_req_init(&req, hdev);
+
memset(&cp, 0, sizeof(cp));
+ cp.enable = LE_SCAN_DISABLE;
+ hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
- hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
+ err = hci_req_run(&req, le_scan_disable_work_complete);
+ if (err)
+ BT_ERR("Disable LE scanning request failed: err %d", err);
}
static void le_scan_work(struct work_struct *work)
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 0e71e6c..faaf1f3 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -974,16 +974,6 @@ static void hci_cc_le_set_scan_enable(struct hci_dev *hdev,
}
clear_bit(HCI_LE_SCAN, &hdev->dev_flags);
-
- if (hdev->discovery.type == DISCOV_TYPE_INTERLEAVED &&
- hdev->discovery.state == DISCOVERY_FINDING) {
- mgmt_interleaved_discovery(hdev);
- } else {
- hci_dev_lock(hdev);
- hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
- hci_dev_unlock(hdev);
- }
-
break;
default:
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 7673398..7201c05 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2621,23 +2621,6 @@ static int remove_remote_oob_data(struct sock *sk, struct hci_dev *hdev,
return err;
}
-int mgmt_interleaved_discovery(struct hci_dev *hdev)
-{
- int err;
-
- BT_DBG("%s", hdev->name);
-
- hci_dev_lock(hdev);
-
- err = hci_do_inquiry(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN);
- if (err < 0)
- hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
-
- hci_dev_unlock(hdev);
-
- return err;
-}
-
static void start_discovery_complete(struct hci_dev *hdev, u8 status)
{
BT_DBG("status %d", status);
--
1.8.2.1
--
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