[riot-notifications] [RIOT-OS/RIOT] WIP: sys/net/gnrc/netif: make use of confirm_send (#15821)

Marian Buschsieweke notifications at github.com
Wed Jan 20 18:01:15 CET 2021

@benpicco: Maybe you can give this a look. I have a very strange regression on the `at86rf215` that I cannot track down. (I only tested for STM32 Ethernet and `at86rf215`, so it might apply to all network devices not implementing `confirm_send()`.) I used the sub GHz interface, but I guess this is be reproducible on the 2.4 GHz interface as well:

1. flash `examples/gnrc_networking`
2. `ifconfig` works
3. `ping6` some reachable node. This will work fine.
4. `ifconfig` still works
5. `ping6` some non-reachable node. This reports lost pings, as expected
6. Now `ping6` to the reachable node no longer works, and `ifconfig` blocks waiting for the IPC reply of the interface. The details of the 2.4 GHz interface still show up, so only the sub GHz network interface thread deadlocked somehow.

Do you have any clue what the issue could be?

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