diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2016-04-10 03:53:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 19:26:55 +0300 |
| commit | 807c8d81f4ec441241cafa3034c58df721fee869 (patch) | |
| tree | 83402ad7f36b135d15d1aa6686ff26aa186b3dec /drivers/tty/serial/crisv10.c | |
| parent | 5604a98e2f95d6221852960a3363588f40d78e22 (diff) | |
| download | linux-807c8d81f4ec441241cafa3034c58df721fee869.tar.xz | |
tty: Replace ASYNC_NORMAL_ACTIVE bit and update atomically
Replace ASYNC_NORMAL_ACTIVE bit in the tty_port::flags field with
TTY_PORT_ACTIVE bit in the tty_port::iflags field. Introduce helpers
tty_port_set_active() and tty_port_active() to abstract atomic bit ops.
Extract state changes from port lock sections, as this usage is
broken and confused; the state transitions are protected by the
tty lock (which mutually excludes parallel open/close/hangup),
and no user tests the active state while holding the port lock.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/crisv10.c')
| -rw-r--r-- | drivers/tty/serial/crisv10.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index 546990334815..92c8c628e00e 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -3648,8 +3648,8 @@ rs_close(struct tty_struct *tty, struct file * filp) schedule_timeout_interruptible(info->port.close_delay); wake_up_interruptible(&info->port.open_wait); } - info->port.flags &= ~ASYNC_NORMAL_ACTIVE; local_irq_restore(flags); + tty_port_set_active(&info->port, 0); /* port closed */ @@ -3732,7 +3732,7 @@ rs_hangup(struct tty_struct *tty) shutdown(info); info->event = 0; info->port.count = 0; - info->port.flags &= ~ASYNC_NORMAL_ACTIVE; + tty_port_set_active(&info->port, 0); info->port.tty = NULL; wake_up_interruptible(&info->port.open_wait); } @@ -3756,7 +3756,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, * then make the check up front and then exit. */ if ((filp->f_flags & O_NONBLOCK) || tty_io_error(tty)) { - info->port.flags |= ASYNC_NORMAL_ACTIVE; + tty_port_set_active(&info->port, 1); return 0; } @@ -3825,7 +3825,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, #endif if (retval) return retval; - info->port.flags |= ASYNC_NORMAL_ACTIVE; + tty_port_set_active(&info->port, 1); return 0; } |