@@ -543,6 +543,23 @@ int hci_dev_open(__u16 dev)
return err;
}
+static int set_powered_off_sync(struct hci_dev *hdev, void *data)
+{
+ return hci_set_powered_sync(hdev, false);
+}
+
+static void set_powered_off_sync_complete(struct hci_dev *hdev, void *data, int err)
+{
+ if (err)
+ bt_dev_err(hdev, "Powering HCI device off before rfkilling failed (%d)", err);
+}
+
+static int hci_dev_do_poweroff(struct hci_dev *hdev)
+{
+ return hci_cmd_sync_queue(hdev, set_powered_off_sync,
+ NULL, set_powered_off_sync_complete);
+}
+
int hci_dev_do_close(struct hci_dev *hdev)
{
int err;
@@ -943,17 +960,27 @@ int hci_get_dev_info(void __user *arg)
static int hci_rfkill_set_block(void *data, bool blocked)
{
struct hci_dev *hdev = data;
+ int err;
BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
return -EBUSY;
+ if (blocked == hci_dev_test_flag(hdev, HCI_RFKILLED))
+ return 0;
+
if (blocked) {
- hci_dev_set_flag(hdev, HCI_RFKILLED);
if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
- !hci_dev_test_flag(hdev, HCI_CONFIG))
- hci_dev_do_close(hdev);
+ !hci_dev_test_flag(hdev, HCI_CONFIG)) {
+ err = hci_dev_do_poweroff(hdev);
+ if (err) {
+ bt_dev_err(hdev, "Powering off device before rfkilling failed (%d)",
+ err);
+ }
+ }
+
+ hci_dev_set_flag(hdev, HCI_RFKILLED);
} else {
hci_dev_clear_flag(hdev, HCI_RFKILLED);
}
On a lot of platforms (at least the MS Surface devices, M1 macbooks, and a few ThinkPads) firmware doesn't do its job when rfkilling a device and the bluetooth adapter is not actually shut down on rfkill. This leads to connected devices remaining in connected state and the bluetooth connection eventually timing out after rfkilling an adapter. Use the rfkill hook in the HCI driver to actually power the device off before rfkilling it. Note that the wifi subsystem is doing something similar by calling cfg80211_shutdown_all_interfaces() in it's rfkill set_block callback (see cfg80211_rfkill_set_block). Signed-off-by: Jonas Dreßler <verdre@v0yd.nl> --- net/bluetooth/hci_core.c | 33 ++++++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-)