tty: Replace ASYNC_INITIALIZED bit and update atomically
Replace ASYNC_INITIALIZED bit in the tty_port::flags field with
TTY_PORT_INITIALIZED bit in the tty_port::iflags field. Introduce helpers
tty_port_set_initialized() and tty_port_initialized() to abstract
atomic bit ops.
Note: the transforms for test_and_set_bit() and test_and_clear_bit()
are unnecessary as the state transitions are already mutually exclusive;
the tty lock prevents concurrent open/close/hangup.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index be9cb61..3dfdfc8 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -464,7 +464,7 @@
/*
* Need to take susp_lock to make sure port is not already being
- * resumed, but no need to hold it due to ASYNC_INITIALIZED.
+ * resumed, but no need to hold it due to initialized
*/
spin_lock_irq(&intfdata->susp_lock);
if (--intfdata->open_ports == 0)
@@ -682,7 +682,7 @@
for (i = 0; i < serial->num_ports; i++) {
port = serial->port[i];
- if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
+ if (!tty_port_initialized(&port->port))
continue;
portdata = usb_get_serial_port_data(port);
