linux-kernel - Re: [Patch net-next]atl1e:fix 2.6.31-git4 -- ATL1E 0000:03:00.0: DMA-API: device driver frees DMA

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Message-Id: <20090916.004452.40084897.davem@davemloft.net>
Date:	Wed, 16 Sep 2009 00:44:52 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jie.yang@...eros.com
Cc:	miles.lane@...il.com, chris.snook@...il.com, jcliburn@...il.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Patch net-next]atl1e:fix 2.6.31-git4 -- ATL1E 0000:03:00.0:
 DMA-API: device driver frees DMA

From: <jie.yang@...eros.com>
Date: Wed, 16 Sep 2009 15:23:04 +0800

> [   25.059969] WARNING: at lib/dma-debug.c:816 check_unmap+0x383/0x55c()
> [   25.059976] Hardware name: 1000HE
> [   25.059984] ATL1E 0000:03:00.0: DMA-API: device driver frees DMA
>      memory with wrong function [device address=0x0000000036b92802]
>      [size=90 bytes] [mapped as single] [unmapped as page]
> 
> use the wrong API when free dma. So when map dma use a flag to 
> demostrate whether it is 'pci_map_single' or 'pci_map_page'. When free 
> the dma, check the flags to select the right APIs('pci_unmap_single' or 'pci_unmap_page').
> 
> set the flags type to u16  instead of unsigned long  on David's comments.
> 
> Signed-off-by: Jie Yang <jie.yang@...eros.com>

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