From d41861ca19c9e96f12a4f1ebbc8255d00909a232 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Sat, 9 Apr 2016 17:53:25 -0700 Subject: 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 Signed-off-by: Greg Kroah-Hartman --- drivers/tty/rocket.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/tty/rocket.c') diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index eb8311b20782..7f3b1db88061 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -495,7 +495,7 @@ static void rp_handle_port(struct r_port *info) if (!info) return; - if ((info->port.flags & ASYNC_INITIALIZED) == 0) { + if (!tty_port_initialized(&info->port)) { printk(KERN_WARNING "rp: WARNING: rp_handle_port called with " "info->flags & NOT_INIT\n"); return; @@ -920,7 +920,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp) /* * Info->count is now 1; so it's safe to sleep now. */ - if (!test_bit(ASYNCB_INITIALIZED, &port->flags)) { + if (!tty_port_initialized(port)) { cp = &info->channel; sSetRxTrigger(cp, TRIG_1); if (sGetChanStatus(cp) & CD_ACT) @@ -944,7 +944,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp) sEnRxFIFO(cp); sEnTransmit(cp); - set_bit(ASYNCB_INITIALIZED, &info->port.flags); + tty_port_set_initialized(&info->port, 1); /* * Set up the tty->alt_speed kludge @@ -1042,9 +1042,9 @@ static void rp_close(struct tty_struct *tty, struct file *filp) } } spin_lock_irq(&port->lock); - port->flags &= ~ASYNC_INITIALIZED; tty->closing = 0; spin_unlock_irq(&port->lock); + tty_port_set_initialized(port, 0); tty_port_set_active(port, 0); mutex_unlock(&port->mutex); tty_port_tty_set(port, NULL); @@ -1513,7 +1513,7 @@ static void rp_hangup(struct tty_struct *tty) sDisCTSFlowCtl(cp); sDisTxSoftFlowCtl(cp); sClrTxXOFF(cp); - clear_bit(ASYNCB_INITIALIZED, &info->port.flags); + tty_port_set_initialized(&info->port, 0); wake_up_interruptible(&info->port.open_wait); } -- cgit v1.2.3-70-g09d2