From: Huang Shijie Date: Fri, 23 May 2014 04:32:54 +0000 (+0800) Subject: serial: imx: disable the receiver ready interrupt for imx_stop_rx X-Git-Tag: firefly_0821_release~176^2~3465^2~38^2~23 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=85878399e7bf14bc36d191d3a0de54b2a40f29e7;p=firefly-linux-kernel-4.4.55.git serial: imx: disable the receiver ready interrupt for imx_stop_rx This patch disables the receiver ready interrupt for imx_stop_rx. It reduces the interrupt numbers when the uart is going to close or suspend. Signed-off-by: Huang Shijie Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index cdaeeeee6cec..3b706add81a9 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -439,6 +439,10 @@ static void imx_stop_rx(struct uart_port *port) temp = readl(sport->port.membase + UCR2); writel(temp & ~UCR2_RXEN, sport->port.membase + UCR2); + + /* disable the `Receiver Ready Interrrupt` */ + temp = readl(sport->port.membase + UCR1); + writel(temp & ~UCR1_RRDYEN, sport->port.membase + UCR1); } /*