linux-kernel - Re: BUG at arch/x86/mm/physaddr.c:5

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Date:	Mon, 26 Jul 2010 19:22:06 +0200
From:	Felix Fietkau <nbd@...nwrt.org>
To:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
CC:	Jike Song <albcamus@...il.com>,
	Ortwin Glück <odi@....ch>,
	linux-kernel@...r.kernel.org,
	Vasanthakumar Thiagarajan <vasanth@...eros.com>,
	jmalinen@...eros.com, Sujith.Manoharan@...eros.com,
	senthilkumar@...eros.com, linux-wireless@...r.kernel.org,
	"John W. Linville" <linville@...driver.com>
Subject: Re: BUG at arch/x86/mm/physaddr.c:5

On 2010-07-26 6:55 PM, Luis R. Rodriguez wrote:
> 2010/7/25 Jike Song <albcamus@...il.com>:
>> 2010/7/23 Ortwin Glück <odi@....ch>:
>>> On 23.07.2010 10:04, Jike Song wrote:
>>>> Seems to be a logical error?  Does the following patch remove your Oops?
>>>
>>> Looking at the init code I agree. Yes, the patch fixes the OOPS. I am sure
>>> because the OOPS occurred at every boot and now it's gone.
>>>
>>> Thanks!
>>>
>>> Ortwin
>>
>> Hi Maintainers,
>>
>>  Since Ortwin has confirmed this patch , would you give me an ACK/NAK please?
>>
> I'll let Felix chime in on this one as he last reviewed this path.
> There were some serious issues with MIPs and DMA that at this point I
> think only he grocked.

A patch exactly like that was already posted and merged into the
wireless-testing tree a while ago, it apparently just hasn't made it to
Linus' tree. John, could we get this one into 2.6.35?

http://git.kernel.org/?p=linux/kernel/git/linville/wireless-testing.git;a=commitdiff;h=56824223ac97ca845652c59bed9ce139e100261b

commit 56824223ac97ca845652c59bed9ce139e100261b
Author: Ming Lei <tom.leiming@...il.com>
Date:   Fri May 14 21:15:38 2010 +0800

    ath9k: fix dma direction for map/unmap in ath_rx_tasklet
    
    For edma, we should use DMA_BIDIRECTIONAL, or else use
    DMA_FROM_DEVICE.
    
    Signed-off-by: Ming Lei <tom.leiming@...il.com>
    Signed-off-by: John W. Linville <linville@...driver.com>

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