tty: serial: mxs-auart: Check the return value from clk_prepare_enable()
clk_prepare_enable() may fail, so let's check its return value and propagate it
in the case of error.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index d8b6fee..aa97fd8 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -734,9 +734,12 @@
static int mxs_auart_startup(struct uart_port *u)
{
+ int ret;
struct mxs_auart_port *s = to_auart_port(u);
- clk_prepare_enable(s->clk);
+ ret = clk_prepare_enable(s->clk);
+ if (ret)
+ return ret;
writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR);
@@ -957,7 +960,9 @@
if (!s)
return -ENODEV;
- clk_prepare_enable(s->clk);
+ ret = clk_prepare_enable(s->clk);
+ if (ret)
+ return ret;
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);