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

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Message-ID: <20150706183021.f105b4fd8e9e39cf6b1989b2@arm.com>
Date:	Mon, 6 Jul 2015 18:30:21 -0500
From:	Kim Phillips <kim.phillips@....com>
To:	Tom Lendacky <thomas.lendacky@....com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH net] amd-xgbe: Fix DMA API debug warning

On Mon, 6 Jul 2015 09:57:37 -0700
Tom Lendacky <thomas.lendacky@....com> wrote:

> 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>
> ---

That works, thanks!

Tested-by: Kim Phillips <kim.phillips@....com>

Kim


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