tty: sdio_uart: Fix the locking on "func" for new code

The new dtr_rts function didn't take the port->func lock as it should so add use of the lock there. Signed-off-by: Alan Cox <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
niw · Dec 11, 2009 · 1f100b3 · 1f100b3
1 parent 4b3b49b
commit 1f100b3
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c
@@ -603,10 +603,14 @@ static void uart_dtr_rts(struct tty_port *tport, int onoff)
 {
 	struct sdio_uart_port *port =
 			container_of(tport, struct sdio_uart_port, port);
+	int ret = sdio_uart_claim_func(port);
+	if (ret)
+		return;
 	if (onoff == 0)
 		sdio_uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
 	else
 		sdio_uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+	sdio_uart_release_func(port);
 }
 
 /**