linux-kernel - Re: [PATCH] ioatdma: fix "ioatdma frees DMA memory with wrong function"

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Message-ID: <a4423d670905120303y5dc8760fva244f62460cfd2c8@mail.gmail.com>
Date:	Tue, 12 May 2009 14:03:25 +0400
From:	Alexander Beregalov <a.beregalov@...il.com>
To:	Maciej Sosnowski <maciej.sosnowski@...el.com>
Cc:	dan.j.williams@...el.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] ioatdma: fix "ioatdma frees DMA memory with wrong 
	function"

2009/4/23 Maciej Sosnowski <maciej.sosnowski@...el.com>:
> as reported by Alexander Beregalov <a.beregalov@...il.com>
>
> ioatdma 0000:00:08.0: DMA-API: device driver frees DMA memory with
> wrong function [device address=0x000000007f76f800] [size=2000 bytes]
> [map
> ped as single] [unmapped as page]
>
> The ioatdma driver was unmapping all regions
> (either allocated as page or single) using unmap_page.
> This patch lets dma driver recognize if unmap_single or unmap_page should be used.
> It introduces two new dma control flags:
> DMA_COMPL_SRC_UNMAP_SINGLE and DMA_COMPL_DEST_UNMAP_SINGLE.
> They should be set to indicate dma driver to do dma-unmapping as single
> (first one for the source, tha latter for the destination).
> If respective flag is not set, the driver assumes dma-unmapping as page.
>
> Signed-off-by: Maciej Sosnowski <maciej.sosnowski@...el.com>
> Acked-by: Dan Williams <dan.j.williams@...el.com>
> Reported-by: Alexander Beregalov <a.beregalov@...il.com>
> Tested-by: Alexander Beregalov <a.beregalov@...il.com>
> ---

Will it be sent to Linus ?
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