netdev - Re: [PATCH net] net: stmmac: Hold rtnl lock in suspend/resume callbacks

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Date:   Mon, 16 Sep 2019 09:12:20 +0200 (CEST)
From:   David Miller <davem@...emloft.net>
To:     Jose.Abreu@...opsys.com
Cc:     netdev@...r.kernel.org, Joao.Pinto@...opsys.com,
        peppe.cavallaro@...com, alexandre.torgue@...com,
        mcoquelin.stm32@...il.com,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        christophe.roullier@...com
Subject: Re: [PATCH net] net: stmmac: Hold rtnl lock in suspend/resume
 callbacks

From: Jose Abreu <Jose.Abreu@...opsys.com>
Date: Fri, 13 Sep 2019 11:50:32 +0200

> We need to hold rnl lock in suspend and resume callbacks because phylink
> requires it. Otherwise we will get a WARN() in suspend and resume.
> 
> Also, move phylink start and stop callbacks to inside device's internal
> lock so that we prevent concurrent HW accesses.
> 
> Fixes: 74371272f97f ("net: stmmac: Convert to phylink and remove phylib logic")
> Reported-by: Christophe ROULLIER <christophe.roullier@...com>
> Tested-by: Christophe ROULLIER <christophe.roullier@...com>
> Signed-off-by: Jose Abreu <joabreu@...opsys.com>

Applied and queued up for v5.3 -stable.

Thanks.