serial: max310x: Unprepare and disable clock in error path

[ Upstream commit 61acabaae5ba58b3c32e6e90d24c2c0827fd27a8 ]

In one error case the clock may be left prepared and enabled.
Unprepare and disable clock in that case to balance state of
the hardware.

Fixes: d4d6f03c4fb3 ("serial: max310x: Try to get crystal clock rate from property")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210625153733.12911-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 978d9d93127e5866df66fea81c85212190d300db..a09ec46e0310d46732115958aef62c5c84831f8e 100644 (file)
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -1293,7 +1293,8 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty
                freq = uartclk;
        if (freq == 0) {
                dev_err(dev, "Cannot get clock rate\n");
-               return -EINVAL;
+               ret = -EINVAL;
+               goto out_clk;
        }
 
        if (xtal) {