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Date: Mon, 4 May 2009 18:58:27 -0700
Message-ID: <da824cf30905041858t2cbd0fa2x4075f387973e2700@mail.gmail.com>
Subject: Re: [Bug #13001] PCI-DMA: Out of IOMMU space
From: Grant Grundler <grundler@google.com>
To: =?UTF-8?B?0JTQsNC90LjQu9CwINCW0YPQutC+0YbQutC40Lk=?= 
	<optimusgd@gmail.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>, rjw@sisk.pl,
       linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org
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2009/5/3 Данила Жукоцкий <optimusgd@gmail.com>:
...
> WARNING: at lib/dma-debug.c:607 check_unmap+0x542/0x610()
> Hardware name: HP xw9400 Workstation
> 3w-9xxx 0001:45:00.0: DMA-API: device driver tries to free DMA memory
> it has not allocated [device address=0x0000000000000000] [size=36
> bytes]

This is definitely a driver bug. Just follow the stack trace back to
the device driver.

thanks!
grant