From 1f100b323d19469b06a63ccd6130ed71760145cc Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 30 Nov 2009 13:16:30 +0000 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/card/sdio_uart.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c index 2a13db54ffc4..f53755533e7e 100644 --- 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); } /** -- 2.20.1