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TTY: cleanup tty->hw_stopped uses

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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>
This commit is contained in:
Jiri Slaby 2013-03-07 13:12:34 +01:00 committed by Greg Kroah-Hartman
parent 4d29994ddb
commit ee79706905
7 changed files with 17 additions and 45 deletions
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16
arch/ia64/hp/sim/simserial.c
View file

@ -142,8 +142,7 @@ static void transmit_chars(struct tty_struct *tty, struct serial_state *info,
goto out;
}
if (info->xmit.head == info->xmit.tail || tty->stopped ||
tty->hw_stopped) {
if (info->xmit.head == info->xmit.tail || tty->stopped) {
#ifdef SIMSERIAL_DEBUG
printk("transmit_chars: head=%d, tail=%d, stopped=%d\n",
info->xmit.head, info->xmit.tail, tty->stopped);
@ -181,7 +180,7 @@ static void rs_flush_chars(struct tty_struct *tty)
struct serial_state *info = tty->driver_data;
if (info->xmit.head == info->xmit.tail || tty->stopped ||
tty->hw_stopped || !info->xmit.buf)
!info->xmit.buf)
return;
transmit_chars(tty, info, NULL);
@ -217,7 +216,7 @@ static int rs_write(struct tty_struct * tty,
* Hey, we transmit directly from here in our case
*/
if (CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE) &&
!tty->stopped && !tty->hw_stopped)
!tty->stopped)
transmit_chars(tty, info, NULL);
return ret;
@ -325,14 +324,6 @@ static int rs_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
static void 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;
}
}
/*
* This routine will shutdown a serial port; interrupts are disabled, and
* DTR is dropped if the hangup on close termio flag is on.
@ -481,7 +472,6 @@ static const struct tty_operations hp_ops = {
.throttle = rs_throttle,
.unthrottle = rs_unthrottle,
.send_xchar = rs_send_xchar,
.set_termios = rs_set_termios,
.hangup = rs_hangup,
.proc_fops = &rs_proc_fops,
};

3
drivers/isdn/i4l/isdn_tty.c
View file

@ -1470,9 +1470,6 @@ isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
tty->termios.c_ospeed == old_termios->c_ospeed)
return;
isdn_tty_change_speed(info);
if ((old_termios->c_cflag & CRTSCTS) &&
!(tty->termios.c_cflag & CRTSCTS))
tty->hw_stopped = 0;
}
}

1
drivers/net/caif/caif_serial.c
View file

@ -88,7 +88,6 @@ static inline void update_tty_status(struct ser_device *ser)
{
ser->tty_status =
ser->tty->stopped << 5 |
ser->tty->hw_stopped << 4 |
ser->tty->flow_stopped << 3 |
ser->tty->packet << 2 |
ser->tty->port->low_latency << 1 |

19
drivers/tty/rocket.c
View file

@ -449,7 +449,7 @@ static void rp_do_transmit(struct r_port *info)
/* Loop sending data to FIFO until done or FIFO full */
while (1) {
if (tty->stopped || tty->hw_stopped)
if (tty->stopped)
break;
c = min(info->xmit_fifo_room, info->xmit_cnt);
c = min(c, XMIT_BUF_SIZE - info->xmit_tail);
@ -1106,15 +1106,12 @@ static void rp_set_termios(struct tty_struct *tty,
/* Handle transition away from B0 status */
if (!(old_termios->c_cflag & CBAUD) && (tty->termios.c_cflag & CBAUD)) {
if (!tty->hw_stopped || !(tty->termios.c_cflag & CRTSCTS))
sSetRTS(cp);
sSetRTS(cp);
sSetDTR(cp);
}
if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios.c_cflag & CRTSCTS)) {
tty->hw_stopped = 0;
if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios.c_cflag & CRTSCTS))
rp_start(tty);
}
}
static int rp_break(struct tty_struct *tty, int break_state)
@ -1570,10 +1567,10 @@ static int rp_put_char(struct tty_struct *tty, unsigned char ch)
spin_lock_irqsave(&info->slock, flags);
cp = &info->channel;
if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room == 0)
if (!tty->stopped && info->xmit_fifo_room == 0)
info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
if (tty->stopped || tty->hw_stopped || info->xmit_fifo_room == 0 || info->xmit_cnt != 0) {
if (tty->stopped || info->xmit_fifo_room == 0 || info->xmit_cnt != 0) {
info->xmit_buf[info->xmit_head++] = ch;
info->xmit_head &= XMIT_BUF_SIZE - 1;
info->xmit_cnt++;
@ -1614,14 +1611,14 @@ static int rp_write(struct tty_struct *tty,
#endif
cp = &info->channel;
if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room < count)
if (!tty->stopped && info->xmit_fifo_room < count)
info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
/*
* If the write queue for the port is empty, and there is FIFO space, stuff bytes
* into FIFO. Use the write queue for temp storage.
*/
if (!tty->stopped && !tty->hw_stopped && info->xmit_cnt == 0 && info->xmit_fifo_room > 0) {
if (!tty->stopped && info->xmit_cnt == 0 && info->xmit_fifo_room > 0) {
c = min(count, info->xmit_fifo_room);
b = buf;
@ -1669,7 +1666,7 @@ static int rp_write(struct tty_struct *tty,
retval += c;
}
if ((retval > 0) && !tty->stopped && !tty->hw_stopped)
if ((retval > 0) && !tty->stopped)
set_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
end:

9
drivers/tty/serial/68328serial.c
View file

@ -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);
}
}

2
drivers/tty/serial/arc_uart.c
View file

@ -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
*/

12
drivers/tty/serial/crisv10.c
View file

@ -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);
}
{