void uart_write_wakeup(struct uart_port *port)
{
struct uart_info *info = port->info;
+ /*
+ * This means you called this function _after_ the port was
+ * closed. No cookie for you.
+ */
+ BUG_ON(!info);
tasklet_schedule(&info->tlet);
}
struct termios *old, unsigned int min, unsigned int max)
{
unsigned int try, baud, altbaud = 38400;
- unsigned int flags = port->flags & UPF_SPD_MASK;
+ upf_t flags = port->flags & UPF_SPD_MASK;
if (flags == UPF_SPD_HI)
altbaud = 57600;
}
static int
-uart_write(struct tty_struct *tty, const unsigned char * buf, int count)
+uart_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
struct uart_state *state = tty->driver_data;
- struct uart_port *port = state->port;
- struct circ_buf *circ = &state->info->xmit;
+ struct uart_port *port;
+ struct circ_buf *circ;
unsigned long flags;
int c, ret = 0;
+ /*
+ * This means you called this function _after_ the port was
+ * closed. No cookie for you.
+ */
+ if (!state || !state->info) {
+ WARN_ON(1);
+ return -EL3HLT;
+ }
+
+ port = state->port;
+ circ = &state->info->xmit;
+
if (!circ->buf)
return 0;
struct uart_port *port = state->port;
unsigned long flags;
+ /*
+ * This means you called this function _after_ the port was
+ * closed. No cookie for you.
+ */
+ if (!state || !state->info) {
+ WARN_ON(1);
+ return;
+ }
+
DPRINTK("uart_flush_buffer(%d) called\n", tty->index);
spin_lock_irqsave(&port->lock, flags);
struct serial_struct new_serial;
struct uart_port *port = state->port;
unsigned long new_port;
- unsigned int change_irq, change_port, old_flags, closing_wait;
+ unsigned int change_irq, change_port, closing_wait;
unsigned int old_custom_divisor, close_delay;
+ upf_t old_flags, new_flags;
int retval = 0;
if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
new_serial.type != port->type;
old_flags = port->flags;
+ new_flags = new_serial.flags;
old_custom_divisor = port->custom_divisor;
if (!capable(CAP_SYS_ADMIN)) {
(close_delay != state->close_delay) ||
(closing_wait != state->closing_wait) ||
(new_serial.xmit_fifo_size != port->fifosize) ||
- (((new_serial.flags ^ old_flags) & ~UPF_USR_MASK) != 0))
+ (((new_flags ^ old_flags) & ~UPF_USR_MASK) != 0))
goto exit;
port->flags = ((port->flags & ~UPF_USR_MASK) |
- (new_serial.flags & UPF_USR_MASK));
+ (new_flags & UPF_USR_MASK));
port->custom_divisor = new_serial.custom_divisor;
goto check_and_exit;
}
port->irq = new_serial.irq;
port->uartclk = new_serial.baud_base * 16;
port->flags = (port->flags & ~UPF_CHANGE_MASK) |
- (new_serial.flags & UPF_CHANGE_MASK);
+ (new_flags & UPF_CHANGE_MASK);
port->custom_divisor = new_serial.custom_divisor;
state->close_delay = close_delay;
state->closing_wait = closing_wait;
#endif
#ifdef CONFIG_SERIAL_CORE_CONSOLE
+/*
+ * uart_console_write - write a console message to a serial port
+ * @port: the port to write the message
+ * @s: array of characters
+ * @count: number of characters in string to write
+ * @write: function to write character to port
+ */
+void uart_console_write(struct uart_port *port, const char *s,
+ unsigned int count,
+ void (*putchar)(struct uart_port *, int))
+{
+ unsigned int i;
+
+ for (i = 0; i < count; i++, s++) {
+ if (*s == '\n')
+ putchar(port, '\r');
+ putchar(port, *s);
+ }
+}
+EXPORT_SYMBOL_GPL(uart_console_write);
+
/*
* Check whether an invalid uart number has been specified, and
* if so, search for the first available port that does have
* If this port is a console, then the spinlock is already
* initialised.
*/
- if (!uart_console(port))
+ if (!(uart_console(port) && (port->cons->flags & CON_ENABLED)))
spin_lock_init(&port->lock);
uart_configure_port(drv, state, port);