From: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Existing callers of serial8250_modem_status() [1] hold the uart port
lock; document.
[1] In-tree callers of serial8250_modem_status()
drivers/tty/serial/8250/8250_fsl.c
fsl8250_handle_irq()
drivers/tty/serial/8250/8250_core.c
serial8250_handle_irq()
serial8250_console_write()
serial8250_get_mctrl() *
* Call graphs for callers of serial8250_get_mctrl() from the function
which acquires the uart port lock
drivers/tty/serial/serial_core.c
uart_port_startup()
uart_tiocmget()
uart_set_termios()
uart_carrier_raised()
ops->get_mctrl() ---> serial8250_get_mctrl()
Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
(cherry picked from commit 5435d20f506f16352a4e1637b8e8fb7c0d422bb9)
Signed-off-by: Chang Rebecca Swee Fun <rebecca.swee.fun.chang@xxxxxxxxx>
---
drivers/tty/serial/8250/8250_core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index bdef8e9..97b4d33 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -1464,6 +1464,7 @@ void serial8250_tx_chars(struct uart_8250_port *up)
}
EXPORT_SYMBOL_GPL(serial8250_tx_chars);
+/* Caller holds uart port lock */
unsigned int serial8250_modem_status(struct uart_8250_port *up)
{
struct uart_port *port = &up->port;
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html