i2c: reduce parent checking to a NOOP in non-I2C_MUX case
In 0826374
- i2c: Multiplexed I2C bus core support
core i2c code increased in size and complexity even when I2C_MUX
wasn't selected.
Turning this check into a constant NULL in the n case lets the
client functions in be simplified too, not needing to include
never-called calls to the mux-specific helpers.
Signed-off-by: Phil Carmody <phil.carmody@partner.samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Коммит
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@ -447,11 +447,13 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
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static inline struct i2c_adapter *
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i2c_parent_is_i2c_adapter(const struct i2c_adapter *adapter)
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{
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#if IS_ENABLED(I2C_MUX)
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struct device *parent = adapter->dev.parent;
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if (parent != NULL && parent->type == &i2c_adapter_type)
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return to_i2c_adapter(parent);
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else
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#endif
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return NULL;
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}
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