i2c: Document the message size limit

[safe/jmp/linux-2.6] / include / linux / i2c.h

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 476abd0..0a5da63 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);