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

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Message-ID: <a4423d670904170501l7cf935a6mf8dbe69e166b8099@mail.gmail.com>
Date:	Fri, 17 Apr 2009 16:01:06 +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

2009/4/17 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.
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