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Message-ID: <20190205132707.GD28397@lunn.ch> Date: Tue, 5 Feb 2019 14:27:07 +0100 From: Andrew Lunn <andrew@...n.ch> To: Miquel Raynal <miquel.raynal@...tlin.com> Cc: Vivien Didelot <vivien.didelot@...il.com>, Florian Fainelli <f.fainelli@...il.com>, "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Gregory Clement <gregory.clement@...tlin.com>, Antoine Tenart <antoine.tenart@...tlin.com>, Maxime Chevallier <maxime.chevallier@...tlin.com>, Nadav Haklai <nadavh@...vell.com> Subject: Re: [PATCH net-next v3] net: dsa: mv88e6xxx: Prevent suspend to RAM On Tue, Feb 05, 2019 at 12:07:28PM +0100, Miquel Raynal wrote: > On one hand, the mv88e6xxx driver has a work queue called in loop > which will attempt register accesses after MDIO bus suspension, that > entirely freezes the platform during suspend. > > On the other hand, the DSA core is not ready yet to support suspend to > RAM operation because so far there is no way to recover reliably the > switch configuration. > > To avoid the kernel to freeze when suspending with a switch driven by > the mv88e6xxx driver, we choose to prevent the driver suspension and > in the same way, the whole platform. > > Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com> Reviewed-by: Andrew Lunn <andrew@...n.ch> Andrew
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