diff options
| author | Jean Delvare <khali@linux-fr.org> | 2010-10-24 18:16:57 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2010-10-24 18:16:57 +0200 |
| commit | 97cc4d49cfcda1c2dad89c00b62a25b628ce2115 (patch) | |
| tree | 1c9120a9e5db76df3f82338c64a2a19d88aedcbc /include | |
| parent | d582963a027fd63f8dfc97a0bf3654d4380e34ce (diff) | |
| download | lwn-97cc4d49cfcda1c2dad89c00b62a25b628ce2115.tar.gz lwn-97cc4d49cfcda1c2dad89c00b62a25b628ce2115.zip | |
i2c: Let i2c_parent_is_i2c_adapter return the parent adapter
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/i2c.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 9391a491501a..1f66fa06a97c 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -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 */ |