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| author | Peter Hurley <peter@hurleysoftware.com> | 2016-04-09 17:53:24 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 09:26:55 -0700 |
| commit | 80f02d5424301bf4df195d09b1a664f394435851 (patch) | |
| tree | 8bfff4fbf3685f767fa776dbd7ae58a63420acd3 /drivers/tty | |
| parent | 2d68655d15bc99981394f7caa769a14b03cac131 (diff) | |
| download | lwn-80f02d5424301bf4df195d09b1a664f394435851.tar.gz lwn-80f02d5424301bf4df195d09b1a664f394435851.zip | |
tty: Replace ASYNC_SUSPENDED bit and update atomically
Replace ASYNC_SUSPENDED bit in the tty_port::flags field with
TTY_PORT_SUSPENDED bit in the tty_port::iflags field. Introduce helpers
tty_port_set_suspended() and tty_port_suspended() to abstract
atomic bit ops.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 2471380fb92e..933606777f45 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -249,7 +249,7 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) * a DCD drop (hangup) at just the right time. Clear suspended bit so * we don't try to resume a port that has been shutdown. */ - clear_bit(ASYNCB_SUSPENDED, &port->flags); + tty_port_set_suspended(port, 0); /* * Free the transmit buffer page. @@ -2007,7 +2007,7 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport) const struct uart_ops *ops = uport->ops; int tries; - set_bit(ASYNCB_SUSPENDED, &port->flags); + tty_port_set_suspended(port, 1); clear_bit(ASYNCB_INITIALIZED, &port->flags); spin_lock_irq(&uport->lock); @@ -2088,7 +2088,7 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) console_start(uport->cons); } - if (port->flags & ASYNC_SUSPENDED) { + if (tty_port_suspended(port)) { const struct uart_ops *ops = uport->ops; int ret; @@ -2118,7 +2118,7 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) } } - clear_bit(ASYNCB_SUSPENDED, &port->flags); + tty_port_set_suspended(port, 0); } mutex_unlock(&port->mutex); |