netdev - Re: [PATCH net] net: phy: fix interrupt handling in non-started states

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Message-ID: <44b0b277-713e-012f-a6cf-402c46a8d92b@gmail.com>
Date:   Wed, 13 Feb 2019 20:10:35 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>
Subject: Re: [PATCH net] net: phy: fix interrupt handling in non-started
 states



On 2/12/2019 10:56 AM, Heiner Kallweit wrote:
> phylib enables interrupts before phy_start() has been called, and if
> we receive an interrupt in a non-started state, the interrupt handler
> returns IRQ_NONE. This causes problems with at least one Marvell chip
> as reported by Andrew.
> Fix this by handling interrupts the same as in phy_mac_interrupt(),
> basically always running the phylib state machine. It knows when it
> has to do something and when not.
> This change allows to handle interrupts gracefully even if they
> occur in a non-started state.
> 
> Fixes: 2b3e88ea6528 ("net: phy: improve phy state checking")
> Reported-by: Andrew Lunn <andrew@...n.ch>
> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian