From: David Miller <davem@davemloft.net>
To: rmk+kernel@armlinux.org.uk
Cc: andrew@lunn.ch, f.fainelli@gmail.com, vivien.didelot@gmail.com,
netdev@vger.kernel.org
Subject: Re: [PATCH net] net: dsa: mv88e6xxx: fix lockup on warm boot
Date: Sat, 29 Feb 2020 21:46:56 -0800 (PST) [thread overview]
Message-ID: <20200229.214656.1463089628684062690.davem@davemloft.net> (raw)
In-Reply-To: <E1j7lU5-0003px-JX@rmk-PC.armlinux.org.uk>
From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Fri, 28 Feb 2020 19:39:41 +0000
> If the switch is not hardware reset on a warm boot, interrupts can be
> left enabled, and possibly pending. This will cause us to enter an
> infinite loop trying to service an interrupt we are unable to handle,
> thereby preventing the kernel from booting.
>
> Ensure that the global 2 interrupt sources are disabled before we claim
> the parent interrupt.
>
> Observed on the ZII development revision B and C platforms with
> reworked serdes support, and using reboot -f to reboot the platform.
>
> Fixes: dc30c35be720 ("net: dsa: mv88e6xxx: Implement interrupt support.")
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Applied and queued up for -stable, thanks.
prev parent reply other threads:[~2020-03-01 5:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 19:39 [PATCH net] net: dsa: mv88e6xxx: fix lockup on warm boot Russell King
2020-02-28 19:52 ` Andrew Lunn
2020-03-01 5:46 ` David Miller [this message]
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