Input: elan_i2c - handle firmware not implementing "get pattern" command (77da21c5) · Commits · 戴 / test

Not all versions of firmware implement "get pattern" command. When encountering those assume that the controllers use older pattern. Signed-off-by:

drivers/input/mouse/elan_i2c_i2c.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -249,7 +249,13 @@ static int elan_i2c_get_pattern(struct i2c_client client, u8 pattern)
		dev_err(&client->dev, "failed to get pattern: %d\n", error);
		return error;
		}
		*pattern = val[1];

		/*
		* Not all versions of firmware implement "get pattern" command.
		* When this command is not implemented the device will respond
		* with 0xFF 0xFF, which we will treat as "old" pattern 0.
		*/
		*pattern = val[0] == 0xFF && val[1] == 0xFF ? 0 : val[1];

		return 0;
		}