i2c: Document the message size limit

[deliverable/linux.git] / include / linux / i2c.h

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 476abd09c92106d2659fc9a406134371ab11b422..0a5da639b32725388c8015ce4f4ca121380cf39b 100644 (file)
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -53,6 +53,7 @@ struct i2c_board_info;
  * on a bus (or read from them). Apart from two basic transfer functions to
  * transmit one message at a time, a more complex version can be used to
  * transmit an arbitrary number of messages without interruption.
+ * @count must be be less than 64k since msg.len is u16.
  */
 extern int i2c_master_send(struct i2c_client *client, const char *buf,
                           int count);