[PATCH 07/13] serial: bfin_sport_uart: protect changes to uart_port
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From: Mike Frysinger on 9 Mar 2010 12:30 From: Sonic Zhang <sonic.zhang(a)analog.com> 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 <sonic.zhang(a)analog.com> Signed-off-by: Mike Frysinger <vapier(a)gentoo.org> --- drivers/serial/bfin_sport_uart.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/serial/bfin_sport_uart.c b/drivers/serial/bfin_sport_uart.c index a720e63..ba5a8b7 100644 --- a/drivers/serial/bfin_sport_uart.c +++ b/drivers/serial/bfin_sport_uart.c @@ -497,6 +497,8 @@ 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); @@ -537,8 +539,6 @@ 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); -- 1.7.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |