[FS#764] MT6721: Any traffic shaping results in crashes/stack traces

[LEDE Bugs]

The following task has a new comment added:

FS#764 - MT6721: Any traffic shaping results in crashes/stack traces
User who did this - camel (camel)

----------
i disabled it completely via web (disable all SSID from 2,4GHZ ..
since that time, i had no crashed .. also traffic shapping running.

currently using another router for 2,4Ghz (what a shame ...)
and did not had any kernel crashes since 2 days ... still testing ...
not sure if it is really related to it.
also with the mt7621 - i have seen max: 3MB/sec.
with a mt7620 device (zbt826) i have throughput 7MB/sec 

so, this mt7621 is really totally unstable and useless.. and maybe it is really related to the mt7621 driver parts of 2,4GHZ. pls test it 
----------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=764#comment2700