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/tty/isicom.c b/drivers/tty/isicom.c
index 0b2bae1..b70187b 100644
--- a/drivers/tty/isicom.c
+++ b/drivers/tty/isicom.c
@@ -438,8 +438,8 @@
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 @@
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;
