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Subject[PATCH 4.14 036/205] iio: adc: meson-saradc: check for devm_kasprintf failure
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit aad172b017617994343e36d8659c69e14cd694fd ]

devm_kasprintf() may return NULL on failure of internal allocation thus
the assignments to init.name are not safe if not checked. On error
meson_sar_adc_clk_init() returns negative values so -ENOMEM in the
(unlikely) failure case of devm_kasprintf() should be fine here.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: 3adbf3427330 ("iio: adc: add a driver for the SAR ADC found in Amlogic Meson SoCs")
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iio/adc/meson_saradc.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 11484cb38b84..9a52a91166d2 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -585,6 +585,9 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,

init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%pOF#adc_div",
indio_dev->dev.of_node);
+ if (!init.name)
+ return -ENOMEM;
+
init.flags = 0;
init.ops = &clk_divider_ops;
clk_parents[0] = __clk_get_name(priv->clkin);
@@ -604,6 +607,9 @@ static int meson_sar_adc_clk_init(struct iio_dev *indio_dev,

init.name = devm_kasprintf(&indio_dev->dev, GFP_KERNEL, "%pOF#adc_en",
indio_dev->dev.of_node);
+ if (!init.name)
+ return -ENOMEM;
+
init.flags = CLK_SET_RATE_PARENT;
init.ops = &clk_gate_ops;
clk_parents[0] = __clk_get_name(priv->adc_div_clk);
--
2.19.1


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