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>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c
index 0b2bae1b2d55..b70187b46d9d 100644
--- a/drivers/tty/isicom.c
+++ b/drivers/tty/isicom.c
@@ -438,8 +438,8 @@ static void isicom_tx(unsigned long _data)
 
         for (; count > 0; count--, port++) {
                 /* port not active or tx disabled to force flow control */
-                if (!(port->port.flags & ASYNC_INITIALIZED) ||
-                                !(port->status & ISI_TXOK))
+                if (!tty_port_initialized(&port->port) ||
+                        !(port->status & ISI_TXOK))
                         continue;
 
                 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
@@ -553,7 +553,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
                 return IRQ_HANDLED;
         }
         port = card->ports + channel;
-        if (!(port->port.flags & ASYNC_INITIALIZED)) {
+        if (!tty_port_initialized(&port->port)) {
                 outw(0x0000, base+0x04); /* enable interrupts */
                 spin_unlock(&card->card_lock);
                 return IRQ_HANDLED;