[riot-notifications] [RIOT-OS/RIOT] net: netdev_driver_t::send() doc unclear (#10969)

Marian Buschsieweke notifications at github.com
Fri Feb 8 11:58:17 CET 2019


#### Description
The [documentation of `netdev_driver_t::send()`](http://api.riot-os.org/structnetdev__driver.html#a39585137953a92c1c58b5e0ad3262096) is unclear on the return value.

#### Steps to reproduce the issue
Read the doc regarding the return value.

#### Expected results
The reader is aware what the return value should be.

#### Actual results
The reader is confused, as the correct return value on success could be any of the following:

- The number of bytes of layer 2 PDU send
- The number of bytes of the layer 2 frame send without hardware supplied overhead (e.g. preamble, sync word, CRC, ...)
- The number of bytes of the layer 2 frame send including any overhead

#### Versions
Current master

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https://github.com/RIOT-OS/RIOT/issues/10969
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