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From:   Punit Agrawal <punitagrawal@gmail.com>
To:     Alexandru Elisei <alexandru.elisei@arm.com>
Cc:     davem@davemloft.net, michael.riesch@wolfvision.net,
        peppe.cavallaro@st.com, alexandre.torgue@foss.st.com,
        joabreu@synopsys.com, kuba@kernel.org, mcoquelin.stm32@gmail.com,
        p.zabel@pengutronix.de, lgirdwood@gmail.com,
        Mark Brown <broonie@kernel.org>, netdev@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
        arm-mail-list <linux-arm-kernel@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [BUG] Ethernet broken on rockpro64 by commit 2d26f6e39afb
 ("net: stmmac: dwmac-rk: fix unbalanced pm_runtime_enable warnings")
References: <8e33c244-b786-18e8-79bc-407e27e4756b@arm.com>
Date:   Fri, 08 Oct 2021 12:17:48 +0900
In-Reply-To: <8e33c244-b786-18e8-79bc-407e27e4756b@arm.com> (Alexandru
        Elisei's message of "Tue, 28 Sep 2021 10:25:59 +0100")
Message-ID: <87zgrk19yb.fsf@stealth>
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Alexandru Elisei <alexandru.elisei@arm.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.

Thanks,
Punit