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

From: Stefan Potyra
Date: Thu Apr 19 2018 - 09:08:00 EST


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

Fixes: 0814e8d5da2b sc16is7xx: enable the clock
Signed-off-by: Stefan Potyra <Stefan.Potyra@xxxxxxxxxxxxxx>
---
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