[PATCH 3/4] Input: synaptics-rmi4 - fix I2C functionality check

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

When adapter does not support required functionality (I2C_FUNC_I2C) we were
returning 0 to the upper layers, making them believe that device bound
successfully.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/rmi4/rmi_i2c.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/input/rmi4/rmi_i2c.c b/drivers/input/rmi4/rmi_i2c.c
index cdc8527..c176218 100644
--- a/drivers/input/rmi4/rmi_i2c.c
+++ b/drivers/input/rmi4/rmi_i2c.c
@@ -193,11 +193,10 @@ static int rmi_i2c_probe(struct i2c_client *client,
 		pdata->sensor_name ? pdata->sensor_name : "-no name-",
 		client->addr, pdata->attn_gpio);
 
-	retval = i2c_check_functionality(client->adapter, I2C_FUNC_I2C);
-	if (!retval) {
-		dev_err(&client->dev, "i2c_check_functionality error %d.\n",
-			retval);
-		return retval;
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(&client->dev,
+			"adapter does not support required functionality.\n");
+		return -ENODEV;
 	}
 
 	if (pdata->gpio_config) {
-- 
1.8.4.2