netdev - Re: [net] ixgbe: fix panic while dumping packets on Tx hang with IOMMU

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Message-Id: <20120726.143035.113701718595617991.davem@davemloft.net>
Date:	Thu, 26 Jul 2012 14:30:35 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	emil.s.tantilov@...el.com, netdev@...r.kernel.org,
	gospo@...hat.com, sassmann@...hat.com
Subject: Re: [net] ixgbe: fix panic while dumping packets on Tx hang with
 IOMMU

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Thu, 26 Jul 2012 04:21:24 -0700

> From: Emil Tantilov <emil.s.tantilov@...el.com>
> 
> This patch resolves a "BUG: unable to handle kernel paging request at ..."
> oops while dumping packet data. The issue occurs with IOMMU enabled due to
> the address provided by phys_to_virt().
> 
> This patch makes use of skb->data on Tx and the virtual address of the pages
> allocated for Rx.
> 
> Signed-off-by: Emil Tantilov <emil.s.tantilov@...el.com>
> Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.
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