i2c: use parent adapter quirks in mux

Inherit parent adapter quirks in MUX in case the devices on the multiplexed
buses are interested in the adapter limitations.

Signed-off-by: Łukasz Gemborowski <lukasz.gemborowski@nokia.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
Fixes: b7f625840267b1 ("i2c: add quirk checks to core")

drivers/i2c/i2c-mux.c

@@ -144,6 +144,7 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
 	priv->adap.dev.parent = &parent->dev;
 	priv->adap.retries = parent->retries;
 	priv->adap.timeout = parent->timeout;
+	priv->adap.quirks = parent->quirks;
 
 	/* Sanity check on class */
 	if (i2c_mux_parent_classes(parent) & class)