linux-kernel - Re: [lkp] [net] af1fee9821: BUG:spinlock_trylock_failure_on_UP_on

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Date:   Mon, 7 Nov 2016 10:31:48 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     kernel test robot <xiaolong.ye@...el.com>
Cc:     Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Allan W. Nielsen" <allan.nielsen@...rosemi.com>,
        LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
        lkp@...org
Subject: Re: [lkp] [net]  af1fee9821:
 BUG:spinlock_trylock_failure_on_UP_on_CPU

On Mon, Nov 07, 2016 at 10:26:28AM +0800, kernel test robot wrote:
> 
> FYI, we noticed the following commit:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
> commit af1fee98219992ba2c12441a447719652ed7e983 ("net: phy: Add support for Microsemi VSC 8530/40 Fast Ethernet PHY")

Humm, interesting. I've no idea how this patch can trigger such a
warning. The USB gadget does not have an Ethernet PHY, let alone a
Microsemi 8530/40 Fast Ethernet PHY this patch adds.

However, it seems nicely documented how to reproduce this. Allan, can
you setup such a system? Reproduce it, then revert the change and see
if it still happens.

   Andrew