netdev - Re: [PATCH net] amd-xgbe: Fix DMA API debug warning

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Message-Id: <20150708.155812.592764115489966730.davem@davemloft.net>
Date:	Wed, 08 Jul 2015 15:58:12 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	thomas.lendacky@....com
Cc:	netdev@...r.kernel.org, kim.phillips@....com
Subject: Re: [PATCH net] amd-xgbe: Fix DMA API debug warning

From: Tom Lendacky <thomas.lendacky@....com>
Date: Mon, 6 Jul 2015 11:57:37 -0500

> When running a kernel configured with CONFIG_DMA_API_DEBUG=y a warning
> is issued:
>   DMA-API: device driver tries to sync DMA memory it has not allocated
> 
> This warning is the result of mapping the full range of the Rx buffer
> pages allocated and then performing a dma_sync_single_for_cpu against
> a calculated DMA address. The proper thing to do is to use the
> dma_sync_single_range_for_cpu with a base DMA address and an offset.
> 
> Reported-by: Kim Phillips <kim.phillips@....com>
> Signed-off-by: Tom Lendacky <thomas.lendacky@....com>

Applied, thanks Tom.
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