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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Chuhong Yuan <hslester96@gmail.com>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Alexandru Ardelean <alexandru.ardelean@analog.com>,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.4 161/434] staging: iio: ad9834: add a check for devm_clk_get
Date:   Sun, 29 Dec 2019 18:23:34 +0100
Message-Id: <20191229172712.466855783@linuxfoundation.org>
In-Reply-To: <20191229172702.393141737@linuxfoundation.org>
References: <20191229172702.393141737@linuxfoundation.org>
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From: Chuhong Yuan <hslester96@gmail.com>

[ Upstream commit a96de139301385e5992768c0f60240ddfbb33325 ]

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@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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