TTY: cleanup tty->hw_stopped uses

tty->hw_stopped is set only by drivers to remember HW state. If it is
never set to 1 in a particular driver, there is no need to check it in
the driver at all. Remove such checks.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 6 insertions, 17 deletions

diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c
index 49399470794..ef2e08e9b59 100644
--- a/drivers/tty/serial/68328serial.c
+++ b/drivers/tty/serial/68328serial.c
@@ -630,8 +630,7 @@ static void rs_flush_chars(struct tty_struct *tty)
 	/* Enable transmitter */
 	local_irq_save(flags);
 
-	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
-			!info->xmit_buf) {
+	if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf) {
 		local_irq_restore(flags);
 		return;
 	}
@@ -697,7 +696,7 @@ static int rs_write(struct tty_struct * tty,
 		total += c;
 	}
 
-	if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
+	if (info->xmit_cnt && !tty->stopped) {
 		/* Enable transmitter */
 		local_irq_disable();		
 #ifndef USE_INTS
@@ -978,10 +977,8 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 	change_speed(info, tty);
 
 	if ((old_termios->c_cflag & CRTSCTS) &&
-	    !(tty->termios.c_cflag & CRTSCTS)) {
-		tty->hw_stopped = 0;
+	    !(tty->termios.c_cflag & CRTSCTS))
 		rs_start(tty);
-	}
 	
 }
 
diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
index d97e194b6bc..cbf1d155b7b 100644
--- a/drivers/tty/serial/arc_uart.c
+++ b/drivers/tty/serial/arc_uart.c
@@ -162,7 +162,7 @@ static unsigned int arc_serial_tx_empty(struct uart_port *port)
 /*
  * Driver internal routine, used by both tty(serial core) as well as tx-isr
  *  -Called under spinlock in either cases
- *  -also tty->stopped / tty->hw_stopped has already been checked
+ *  -also tty->stopped has already been checked
  *     = by uart_start( ) before calling us
  *     = tx_ist checks that too before calling
  */
diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c
index 5f37c31e32b..50f56f39d43 100644
--- a/drivers/tty/serial/crisv10.c
+++ b/drivers/tty/serial/crisv10.c
@@ -2534,8 +2534,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
 	}
 	/* Normal char-by-char interrupt */
 	if (info->xmit.head == info->xmit.tail
-	    || info->port.tty->stopped
-	    || info->port.tty->hw_stopped) {
+	    || info->port.tty->stopped) {
 		DFLOW(DEBUG_LOG(info->line, "tx_int: stopped %i\n",
 				info->port.tty->stopped));
 		e100_disable_serial_tx_ready_irq(info);
@@ -3098,7 +3097,6 @@ rs_flush_chars(struct tty_struct *tty)
 	if (info->tr_running ||
 	    info->xmit.head == info->xmit.tail ||
 	    tty->stopped ||
-	    tty->hw_stopped ||
 	    !info->xmit.buf)
 		return;
 
@@ -3176,7 +3174,6 @@ static int rs_raw_write(struct tty_struct *tty,
 
 	if (info->xmit.head != info->xmit.tail &&
 	    !tty->stopped &&
-	    !tty->hw_stopped &&
 	    !info->tr_running) {
 		start_transmit(info);
 	}
@@ -3733,10 +3730,8 @@ rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 
 	/* Handle turning off CRTSCTS */
 	if ((old_termios->c_cflag & CRTSCTS) &&
-	    !(tty->termios.c_cflag & CRTSCTS)) {
-		tty->hw_stopped = 0;
+	    !(tty->termios.c_cflag & CRTSCTS))
 		rs_start(tty);
-	}
 
 }
 
@@ -4256,9 +4251,6 @@ static void seq_line_info(struct seq_file *m, struct e100_serial *info)
 		if (info->port.tty->stopped)
 			seq_printf(m, " stopped:%i",
 				   (int)info->port.tty->stopped);
-		if (info->port.tty->hw_stopped)
-			seq_printf(m, " hw_stopped:%i",
-				   (int)info->port.tty->hw_stopped);
 	}
 
 	{