From: Sonic Zhang Date: Tue, 9 Mar 2010 17:25:34 +0000 (-0500) Subject: serial: bfin_sport_uart: protect changes to uart_port X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9498dc95ca6fa6e5b044f39696ab317996fd2fe5;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git serial: bfin_sport_uart: protect changes to uart_port Common serial API says we need to grab the port lock before modifying the port state to prevent inconsistent state between threads. Signed-off-by: Sonic Zhang Signed-off-by: Mike Frysinger Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/serial/bfin_sport_uart.c b/drivers/serial/bfin_sport_uart.c index 8cb0a40c2baa..5224db2d2793 100644 --- a/drivers/serial/bfin_sport_uart.c +++ b/drivers/serial/bfin_sport_uart.c @@ -498,6 +498,8 @@ static void sport_set_termios(struct uart_port *port, /* up->parib = 1; */ } + spin_lock_irqsave(&up->port.lock, flags); + port->read_status_mask = OE; if (termios->c_iflag & INPCK) port->read_status_mask |= (FE | PE); @@ -538,8 +540,6 @@ static void sport_set_termios(struct uart_port *port, /* uart baud rate */ port->uartclk = uart_get_baud_rate(port, termios, old, 0, get_sclk()/16); - spin_lock_irqsave(&up->port.lock, flags); - /* Disable UART */ SPORT_PUT_TCR1(up, SPORT_GET_TCR1(up) & ~TSPEN); SPORT_PUT_RCR1(up, SPORT_GET_RCR1(up) & ~RSPEN);