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| author | Jiri Slaby <jslaby@suse.cz> | 2011-11-09 21:33:51 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-15 15:59:03 -0800 |
| commit | b922e19d03a680d732b61dc8e82d9948f6f8b6c7 (patch) | |
| tree | b2bb41893f4c11b049af559feae99e168b458f6f /drivers/tty/serial | |
| parent | 0b1db83081599615cf7b254aebc14a2d8f6ca056 (diff) | |
| download | linux-3.10-b922e19d03a680d732b61dc8e82d9948f6f8b6c7.tar.gz linux-3.10-b922e19d03a680d732b61dc8e82d9948f6f8b6c7.tar.bz2 linux-3.10-b922e19d03a680d732b61dc8e82d9948f6f8b6c7.zip | |
TTY: serial, fill uart_port_shutdown
Let's fill the port_ops->shutdown. We will need this for hangup and
close port helpers.
We don't need to touch DTR/RTS registers in uart_port_shutdown. They
are set to off from port_close_start properly already.
Also we don't need to pin the TTY_IO_ERROR bit. This will be done in
close/hangup paths.
We leave uart_shutdown as is, because it is used (and will be) from
several paths now. Like from suspend.
The point is to not touch ASYNC_INITIALIZED bit. It will be set (and
checked) properly by the tty port helpers.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 42 |
1 files changed, 24 insertions, 18 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index d7e8a5ef187..68763c0fa82 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -61,6 +61,8 @@ static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, static void uart_wait_until_sent(struct tty_struct *tty, int timeout); static void uart_change_pm(struct uart_state *state, int pm_state); +static void uart_port_shutdown(struct tty_port *port); + /* * This routine is used by the interrupt handler to schedule processing in * the software interrupt portion of the driver. @@ -228,24 +230,7 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) if (!tty || (tty->termios->c_cflag & HUPCL)) uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); - /* - * clear delta_msr_wait queue to avoid mem leaks: we may free - * the irq here so the queue might never be woken up. Note - * that we won't end up waiting on delta_msr_wait again since - * any outstanding file descriptors should be pointing at - * hung_up_tty_fops now. - */ - wake_up_interruptible(&port->delta_msr_wait); - - /* - * Free the IRQ and disable the port. - */ - uport->ops->shutdown(uport); - - /* - * Ensure that the IRQ handler isn't running on another CPU. - */ - synchronize_irq(uport->irq); + uart_port_shutdown(port); } /* @@ -1411,6 +1396,27 @@ static int uart_port_activate(struct tty_port *port, struct tty_struct *tty) static void uart_port_shutdown(struct tty_port *port) { + struct uart_state *state = container_of(port, struct uart_state, port); + struct uart_port *uport = state->uart_port; + + /* + * clear delta_msr_wait queue to avoid mem leaks: we may free + * the irq here so the queue might never be woken up. Note + * that we won't end up waiting on delta_msr_wait again since + * any outstanding file descriptors should be pointing at + * hung_up_tty_fops now. + */ + wake_up_interruptible(&port->delta_msr_wait); + + /* + * Free the IRQ and disable the port. + */ + uport->ops->shutdown(uport); + + /* + * Ensure that the IRQ handler isn't running on another CPU. + */ + synchronize_irq(uport->irq); } static int uart_carrier_raised(struct tty_port *port) |