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serial: switch the serial core to int put_char methods 

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-04-30 00:54:11 -07:00 committed by Linus Torvalds
parent 56dbbb9a57
commit 23d22cea85
1 changed files with 8 additions and 4 deletions
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12
drivers/serial/serial_core.c
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@ -422,6 +422,7 @@ uart_get_divisor(struct uart_port *port, unsigned int baud)
EXPORT_SYMBOL(uart_get_divisor);
/* FIXME: Consistent locking policy */
static void
uart_change_speed(struct uart_state *state, struct ktermios *old_termios)
{
@ -454,27 +455,30 @@ uart_change_speed(struct uart_state *state, struct ktermios *old_termios)
port->ops->set_termios(port, termios, old_termios);
}
static inline void
static inline int
__uart_put_char(struct uart_port *port, struct circ_buf *circ, unsigned char c)
{
unsigned long flags;
int ret = 0;
if (!circ->buf)
return;
return 0;
spin_lock_irqsave(&port->lock, flags);
if (uart_circ_chars_free(circ) != 0) {
circ->buf[circ->head] = c;
circ->head = (circ->head + 1) & (UART_XMIT_SIZE - 1);
ret = 1;
}
spin_unlock_irqrestore(&port->lock, flags);
return ret;
}
static void uart_put_char(struct tty_struct *tty, unsigned char ch)
static int uart_put_char(struct tty_struct *tty, unsigned char ch)
{
struct uart_state *state = tty->driver_data;
__uart_put_char(state->port, &state->info->xmit, ch);
return __uart_put_char(state->port, &state->info->xmit, ch);
}
static void uart_flush_chars(struct tty_struct *tty)