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Date:	Tue, 28 Feb 2012 14:30:51 -0500 (EST)
From:	David Miller <>
Subject: Re: [PATCH] mlx4: prevent the device from being removed

From: Thadeu Lima de Souza Cascardo <>
Date: Tue, 28 Feb 2012 15:36:16 -0300

> When a EEH happens, the catas poll code will try to restart the device,
> removing it and adding it back again. The EEH code will try to do the
> same. One of the threads ends up accessing memory that was freed by the
> other thread and we get a crash.

Stop adding bandaids to the locking.

If the EEH infrastructure doesn't synchronize parallel operations
on the same device, that is the real bug, and that's where the real
fix belongs.

I refuse to apply this patch.
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