netdev - Re: [PATCH net] bnx2x: Delay during kdump load

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Date:	Wed, 29 Apr 2015 15:50:46 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	Yuval.Mintz@...gic.com
Cc:	netdev@...r.kernel.org, Ariel.Elior@...gic.com
Subject: Re: [PATCH net] bnx2x: Delay during kdump load

From: Yuval Mintz <Yuval.Mintz@...gic.com>
Date: Wed, 29 Apr 2015 08:09:49 +0300

> In a kdump environment interfaces might be re-loaded without a proper
> unload sequence in the previous running kernel.
> bnx2x management FW and driver maintains a `pulse' that notifies the FW
> that the driver is still up and running.
> 
> Driver load on the kdump kernel should be performed only after the pulse
> has been out-of-sync long enough for the management FW to identify that
> the driver has crashed, on which point it will perform some necessary
> cleanup of the HW.
> 
> In today's distros kdump loading is quite fast, sometimes too fast for our
> FW to get out-of-sync. This patch delays the bnx2x's probe during kdump
> to allow a proper re-load on the kdump kernel.
> 
> Signed-off-by: Yuval Mintz <Yuval.Mintz@...gic.com>

Applied.
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