linux-kernel - Re: [BUG] Ethernet broken on rockpro64 by commit 2d26f6e39afb ("net: stmmac: dwmac-rk: fix unbalanced pm_runtime

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Date:   Fri, 8 Oct 2021 10:27:41 +0100
From:   Alexandru Elisei <alexandru.elisei@....com>
To:     Punit Agrawal <punitagrawal@...il.com>
Cc:     davem@...emloft.net, michael.riesch@...fvision.net,
        peppe.cavallaro@...com, alexandre.torgue@...s.st.com,
        joabreu@...opsys.com, kuba@...nel.org, mcoquelin.stm32@...il.com,
        p.zabel@...gutronix.de, lgirdwood@...il.com,
        Mark Brown <broonie@...nel.org>, netdev@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        arm-mail-list <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] Ethernet broken on rockpro64 by commit 2d26f6e39afb ("net:
 stmmac: dwmac-rk: fix unbalanced pm_runtime_enable warnings")

Hi Punit,

On Fri, Oct 08, 2021 at 12:17:48PM +0900, Punit Agrawal wrote:
> Alexandru Elisei <alexandru.elisei@....com> writes:
> 
> > (Sorry I'm sending this to the wrong person, this is what I got
> > scripts/get_maintainer.pl for the file touched by the commit)
> >
> > After commit 2d26f6e39afb ("net: stmmac: dwmac-rk: fix unbalanced
> > pm_runtime_enable warnings"), the network card on my rockpro64-v2 was left unable
> > to get a DHCP lease from the network. The offending commit was found by bisecting
> > the kernel; I tried reverting the commit from current master (commit 0513e464f900
> > ("Merge tag 'perf-tools-fixes-for-v5.15-2021-09-27' of
> > git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux")) and the network card
> > was working as expected.
> >
> > It goes without saying that I can help with testing the fix and
> > further diagnosing.
> 
> A fix was recently merged for this (see aec3f415f724 ("net: stmmac:
> dwmac-rk: Fix ethernet on rk3399 based devices") and should show up in
> the next rc. Please shout out if that doesn't fix the broken ethernet
> for you.

I can confirm that it's now working, many thanks.

Alex

> 
> Thanks,
> Punit
>