Andreas Rammhold [off-list ref] writes:

On 17:20 02.10.21, Jakub Kicinski wrote:

quoted

On Sat, 2 Oct 2021 23:33:03 +0200 Andreas Rammhold wrote:

quoted

On 16:02 01.10.21, Jakub Kicinski wrote:

quoted

On Wed, 29 Sep 2021 23:02:35 +0200 Heiko Stübner wrote:  

quoted

On a rk3399-puma which has the described issue,
Tested-by: Heiko Stuebner <heiko@sntech.de>  

Applied, thanks!  

This also fixed the issue on a RockPi4.

Will any of you submit this to the stable kernels (as this broke within
3.13 for me) or shall I do that?

I won't. The patch should be in Linus's tree in around 1 week - at which
point anyone can request the backport.

That said, as you probably know, 4.4 is the oldest active stable branch,
the ship has sailed for anything 3.x.

I am sorry. I meant 5.13.

AFAICT, 2d26f6e39afb ("net: stmmac: dwmac-rk: fix unbalanced
pm_runtime_enable warnings") is not in 5.13 stable.

Either you're not using the stable kernel or there's another issue
breaking things on the RockPi4.