[riot-notifications] [RIOT-OS/RIOT] 6lo gnrc fragmentation expects driver to block on TX (#7474)

Marian Buschsieweke notifications at github.com
Thu Feb 7 11:12:19 CET 2019

I just stumbled upon the same issue for my rewrite of the `cc110x` driver in https://github.com/RIOT-OS/RIOT/pull/10340.

I would like to point out that an increasing number of network device driver are adding workarounds for this issue, which results in a lot of code duplication. It would clearly better to use, as @miri64 suggested, to wait for `NETDEV_EVENT_TX_COMPLETE ` (and I think also `NETDEV_EVENT_TX_MEDIUM_BUSY` and `NETDEV_EVENT_TX_TIMEOUT`) before passing the next frame to the driver.

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