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i2c: Let i2c_parent_is_i2c_adapter return the parent adapter

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This makes the calling site's code clearer IMHO.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
This commit is contained in:
Jean Delvare
2010-10-24 18:16:57 +02:00
committed by Jean Delvare
parent d582963a02
commit 97cc4d49cf
3 changed files with 32 additions and 22 deletions
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11
include/linux/i2c.h
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@@ -384,10 +384,15 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
dev_set_drvdata(&dev->dev, data);
}
static inline int i2c_parent_is_i2c_adapter(const struct i2c_adapter *adapter)
static inline struct i2c_adapter *
i2c_parent_is_i2c_adapter(const struct i2c_adapter *adapter)
{
return adapter->dev.parent != NULL
&& adapter->dev.parent->type == &i2c_adapter_type;
struct device *parent = adapter->dev.parent;
if (parent != NULL && parent->type == &i2c_adapter_type)
return to_i2c_adapter(parent);
else
return NULL;
}
/* Adapter locking functions, exported for shared pin cases */