[PATCH] staging: iio: ad9834: add a check for devm_clk_get

[Chuhong Yuan]

ad9834_probe misses a check for devm_clk_get and may cause problems.
Add a check like what ad9832 does to fix it.

Signed-off-by: Chuhong Yuan <hslester96 at gmail.com>
---
 drivers/staging/iio/frequency/ad9834.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/staging/iio/frequency/ad9834.c b/drivers/staging/iio/frequency/ad9834.c
index 038d6732c3fd..23026978a5a5 100644
--- a/drivers/staging/iio/frequency/ad9834.c
+++ b/drivers/staging/iio/frequency/ad9834.c
@@ -417,6 +417,10 @@ static int ad9834_probe(struct spi_device *spi)
 	st = iio_priv(indio_dev);
 	mutex_init(&st->lock);
 	st->mclk = devm_clk_get(&spi->dev, NULL);
+	if (IS_ERR(st->mclk)) {
+		ret = PTR_ERR(st->mclk);
+		goto error_disable_reg;
+	}
 
 	ret = clk_prepare_enable(st->mclk);
 	if (ret) {
-- 
2.20.1