Bluetooth: Introduce a new HCI_RFKILLED flag
Johan Hedberg [Fri, 13 Sep 2013 05:58:17 +0000 (08:58 +0300)]
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>

include/net/bluetooth/hci.h
net/bluetooth/hci_core.c

index e0512aa..0ef0006 100644 (file)
@@ -104,6 +104,7 @@ enum {
 enum {
        HCI_SETUP,
        HCI_AUTO_OFF,
+       HCI_RFKILLED,
        HCI_MGMT,
        HCI_PAIRABLE,
        HCI_SERVICE_CACHE,
index ace5e55..45c91b2 100644 (file)
@@ -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)