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/isdn/i4l/isdn_tty.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c index 023a350a8cd8..63eaa0a9f8a1 100644 --- a/drivers/isdn/i4l/isdn_tty.c +++ b/drivers/isdn/i4l/isdn_tty.c @@ -1049,7 +1049,7 @@ isdn_tty_change_speed(modem_info *info) static int isdn_tty_startup(modem_info *info) { - if (info->port.flags & ASYNC_INITIALIZED) + if (tty_port_initialized(&info->port)) return 0; isdn_lock_drivers(); #ifdef ISDN_DEBUG_MODEM_OPEN @@ -1066,7 +1066,7 @@ isdn_tty_startup(modem_info *info) */ isdn_tty_change_speed(info); - info->port.flags |= ASYNC_INITIALIZED; + tty_port_set_initialized(&info->port, 1); info->msr |= (UART_MSR_DSR | UART_MSR_CTS); info->send_outstanding = 0; return 0; @@ -1079,7 +1079,7 @@ isdn_tty_startup(modem_info *info) static void isdn_tty_shutdown(modem_info *info) { - if (!(info->port.flags & ASYNC_INITIALIZED)) + if (!tty_port_initialized(&info->port)) return; #ifdef ISDN_DEBUG_MODEM_OPEN printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line); @@ -1099,7 +1099,7 @@ isdn_tty_shutdown(modem_info *info) if (info->port.tty) set_bit(TTY_IO_ERROR, &info->port.tty->flags); - info->port.flags &= ~ASYNC_INITIALIZED; + tty_port_set_initialized(&info->port, 0); } /* isdn_tty_write() is the main send-routine. It is called from the upper @@ -1577,7 +1577,7 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp) * interrupt driver to stop checking the data ready bit in the * line status register. */ - if (port->flags & ASYNC_INITIALIZED) { + if (tty_port_initialized(port)) { tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ /* * Before we drop DTR, make sure the UART transmitter -- cgit v1.2.3