linux-kernel - Re: [PATCH] net: stmmac: don't stop RXC during LPI

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Message-ID: <YfFEulZJKzuRQfeG@xhacker>
Date:   Wed, 26 Jan 2022 20:55:22 +0800
From:   Jisheng Zhang <jszhang@...nel.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: stmmac: don't stop RXC during LPI

On Sun, Jan 23, 2022 at 06:39:26PM +0100, Andrew Lunn wrote:
> > I think this is a common issue because the MAC needs phy's RXC for RX
> > logic. But it's better to let other stmmac users verify. The issue
> > can easily be reproduced on platforms with PHY_POLL external phy.
> 
> What is the relevance of PHY polling here? Are you saying if the PHY
> is using interrupts you do not see this issue?

I tried these two days, if the PHY is using interrupts, I can't
reproduce the issue. It looks a bit more complex. Any suggestions?

Thanks in advance