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Subject: media: ov8856: Check reading clock frequency succeeded
Author: Sakari Ailus <sakari.ai...@linux.intel.com>
Date: Wed Aug 7 05:34:43 2019 -0300
Instead of blindly trusting getting the clock frequency succeeded end then
testing it against a pre-defined value, verify reading the value
succeeded.
Fixes: 879347f0c258 ("media: ov8856: Add support for OV8856 sensor")
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
drivers/media/i2c/ov8856.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c
index cd347d6b7b9d..8655842af275 100644
--- a/drivers/media/i2c/ov8856.c
+++ b/drivers/media/i2c/ov8856.c
@@ -1106,7 +1106,10 @@ static int ov8856_check_hwcfg(struct device *dev)
if (!fwnode)
return -ENXIO;
- fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
+ ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
+ if (ret)
+ return ret;
+
if (mclk != OV8856_MCLK) {
dev_err(dev, "external clock %d is not supported", mclk);
return -EINVAL;
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