linux-kernel - Re: 2.6.30-rc1: ioatdma: DMA-API: device driver frees DMA memory with wrong function

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Date:	Wed, 22 Apr 2009 19:48:53 +0400
From:	Alexander Beregalov <a.beregalov@...il.com>
To:	"Sosnowski, Maciej" <maciej.sosnowski@...el.com>
Cc:	"Williams, Dan J" <dan.j.williams@...el.com>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.30-rc1: ioatdma: DMA-API: device driver frees DMA memory with 
	wrong function

2009/4/22 Sosnowski, Maciej <maciej.sosnowski@...el.com>:
> Alexander Beregalov wrote:
>> 2009/4/17 Sosnowski, Maciej <maciej.sosnowski@...el.com>:
>>> Dan Williams wrote:
>>>> On Wed, Apr 15, 2009 at 5:39 AM, Alexander Beregalov
>>>> <a.beregalov@...il.com> wrote:
>>>>> 2009/4/9 Alexander Beregalov <a.beregalov@...il.com>:
>>>>>> ioatdma 0000:00:08.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
>>>>>> ioatdma 0000:00:08.0: setting latency timer to 64
>>>>>> ioatdma 0000:00:08.0: Intel(R) I/OAT DMA Engine found, 4 channels,
>>>>>> device version 0x12, driver version 3.64
>>>>>>  alloc irq_desc for 33 on cpu 0 node 0
>>>>>>  alloc kstat_irqs on cpu 0 node 0
>>>>>> ioatdma 0000:00:08.0: irq 33 for MSI/MSI-X
>>>>>> ------------[ cut here ]------------
>>>>>> WARNING: at lib/dma-debug.c:565 check_unmap+0x2f6/0x6a0()
>>>>>> Hardware name: PowerEdge 1950
>>>>>> 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 problem still persists.
>>>>
>>>> Thanks for the report Alexander.  Maciej and I are looking into a fix.
>>>>
>>>> Regards,
>>>> Dan
>>>
>>> Hi Alexander,
>>>
>>> Could you check if the following patch helps?
>>
>> Hi Maciej.
>>
>> No, unfortunately it does not help. The same warning message.
>
> Ok, I have missed to cover self_test case.
> How about this one instead?
>

It works! Thanks.

Reported-by: Alexander Beregalov <a.beregalov@...il.com>
Tested-by: Alexander Beregalov <a.beregalov@...il.com>
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