commit ddb6b94bd7da10029e3087d97df097e1ec3478f3
author Marcus Shawcroft <marcus.shawcroft@arm.com> Sun Feb 05 23:33:37 2017 +0000
committer Anas Nashif <nashif@linux.intel.com> Tue Feb 07 18:32:35 2017 +0000
tree bfbd4ea52884062bdba1539aefc59a4e2647c8de
parent 08e0ade38a5058fc6f1bdf6038047c9b92b0a5f3

i2c: Implement consistent i2c no msgs behaviour

The I2C drivers handle an empty list of I2C messages inconsistenty.
There are two different behaviours, one set of drivers dectects a
requests to transfer zero messages and return -EINVAL while the other
group simple transfer no data and return success.

Adopt the latter behaviour consistently across all drivers.  Update
the i2c.h API documentation to reflect this behaviour.

Change-Id: I427fc1b0e18ddc04b7b59c294e0240b3d6ca4073
Signed-off-by: Marcus Shawcroft <marcus.shawcroft@arm.com>