netdev - Re: [PATCH net] amd-xgbe: Request IRQs only after driver is fully setup

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Date:	Fri, 27 Feb 2015 17:13:20 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	thomas.lendacky@....com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net] amd-xgbe: Request IRQs only after driver is fully
 setup

From: Tom Lendacky <thomas.lendacky@....com>
Date: Wed, 25 Feb 2015 13:50:12 -0600

> It is possible that the hardware may not have been properly shutdown
> before this driver gets control, through use by firmware, for example.
> Until the driver is loaded, interrupts associated with the hardware
> could go pending. When the IRQs are requested napi support has not
> been initialized yet, but the ISR will get control and schedule napi
> processing resulting in a kernel panic because the poll routine has not
> been set.
> 
> Adjust the code so that the driver is fully ready to handle and process
> interrupts as soon as the IRQs are requested. This involves requesting
> and freeing IRQs during start and stop processing and ordering the napi
> add and delete calls appropriately.
> 
> Also adjust the powerup and powerdown routines to match the start and
> stop routines in regards to the ordering of tasks, including napi
> related calls.
> 
> Signed-off-by: Tom Lendacky <thomas.lendacky@....com>

This looks a lot better, applied, thanks Tom.
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