[PATCH] Check for an error when the clock is enabled.

[Stefan Potyra]

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 0814e8d5da2b sc16is7xx: enable the clock
Signed-off-by: Stefan Potyra <stefan.pot...@elektrobit.com>
---
 drivers/tty/serial/sc16is7xx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 65792a3539d0..243c96025053 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1168,7 +1168,10 @@ static int sc16is7xx_probe(struct device *dev,
                else
                        return PTR_ERR(s->clk);
        } else {
-               clk_prepare_enable(s->clk);
+               ret = clk_prepare_enable(s->clk);
+               if (ret)
+                       return ret;
+
                freq = clk_get_rate(s->clk);
        }
 
-- 
2.17.0