Bluetooth: Introduce a new HCI_RFKILLED flag

commit 5e130367d43ff22836bbae380d197d600fe8ddbb upstream.

This makes it more convenient to check for rfkill (no need to check for
dev->rfkill before calling rfkill_blocked()) and also avoids potential
races if the RFKILL state needs to be checked from within the rfkill
callback.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 11 insertions, 5 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index e0512aaef4b8..0ef00066dae8 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -104,6 +104,7 @@ enum {
 enum {
         HCI_SETUP,
         HCI_AUTO_OFF,
+        HCI_RFKILLED,
         HCI_MGMT,
         HCI_PAIRABLE,
         HCI_SERVICE_CACHE,
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index ace5e55fe5a3..45c91b27d9d1 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1123,7 +1123,7 @@ int hci_dev_open(__u16 dev)
                 goto done;
         }
 
-        if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
+        if (test_bit(HCI_RFKILLED, &hdev->dev_flags)) {
                 ret = -ERFKILL;
                 goto done;
         }
@@ -1545,10 +1545,12 @@ static int hci_rfkill_set_block(void *data, bool blocked)
 
         BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
 
-        if (!blocked)
-                return 0;
-
-        hci_dev_do_close(hdev);
+        if (blocked) {
+                set_bit(HCI_RFKILLED, &hdev->dev_flags);
+                hci_dev_do_close(hdev);
+        } else {
+                clear_bit(HCI_RFKILLED, &hdev->dev_flags);
+}
 
         return 0;
 }
@@ -2241,6 +2243,9 @@ int hci_register_dev(struct hci_dev *hdev)
                 }
         }
 
+        if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
+                set_bit(HCI_RFKILLED, &hdev->dev_flags);
+
         set_bit(HCI_SETUP, &hdev->dev_flags);
 
         if (hdev->dev_type != HCI_AMP)