MT7621 Flow Control

Jaap Buurman jaapbuurman at
Thu Aug 6 07:43:03 EDT 2020

Dear all,

I have noticed the flow control work for mt7621 in the following
Openwrt patch:;a=commit;h=c8f8e59816eca49d776562d2d302bf990a87faf0

However, the problem that the patch is supposed to fix is still
occurring, even in combination with other experimental patches
submitted. These experiences can be read about here:

However, on this mailing list a user by the name of Kristian claims
that disabling flow control helps fix this problem, as can be read

>From what I understood, he was running many mt7621 devices
commercially, with many of them experiencing the issue, which were all
fixed with his own flow control patch. My question is why the decision
was made to only disable flow control on port 5 in the above mentioned
Openwrt patch? AFAIK, Kristian's own patch disables flow control on
all of the ports and he claims the issue is fixed for him. Perhaps the
current patch should be extended to disable flow control on all ports?
What are people's thoughts on this?

Yours sincerely,


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