From: Greg KH <greg@kroah.com>
To: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: eric.valette@free.fr, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org
Subject: Re: DMA debug trace pointing to rtl8187
Date: Tue, 5 May 2009 22:21:20 -0700 [thread overview]
Message-ID: <20090506052120.GA6239@kroah.com> (raw)
In-Reply-To: <20090506133131F.fujita.tomonori@lab.ntt.co.jp>
On Wed, May 06, 2009 at 01:30:47PM +0900, FUJITA Tomonori wrote:
> CC'ed linux-usb,
>
> The ehci_hcd driver uses buffers on the stack for DMA?
No, it should not.
But USB drivers are known to do this incorrectly. Those USB drivers
should be fixed.
> On Sun, 03 May 2009 17:36:24 +0200
> Eric Valette <eric.valette@free.fr> wrote:
>
> > ------------[ cut here ]------------
> >
> > WARNING: at /usr/src/linux-2.6.22.9/lib/dma-debug.c:609
>
> Hmm, the kernel version is wired. lib/dma-debug.c was added in
> 2.6.30-rc.
Very odd. What specific kernel version caused this warning?
thanks,
greg k-h
next prev parent reply other threads:[~2009-05-06 6:42 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-03 15:36 DMA debug trace pointing to rtl8187 Eric Valette
2009-05-06 4:30 ` FUJITA Tomonori
2009-05-06 5:21 ` Greg KH [this message]
2009-05-06 6:35 ` Eric Valette
2009-05-06 6:45 ` Greg KH
2009-05-06 18:02 ` [RFT] rtl8187: use DMA-aware buffers with usb_control_msg John W. Linville
2009-05-08 23:20 ` Hin-Tak Leung
2009-05-09 9:38 ` Eric Valette
2009-05-09 13:57 ` Greg KH
2009-05-09 15:50 ` John W. Linville
2009-05-09 16:35 ` Greg KH
2009-05-09 21:24 ` Larry Finger
2009-05-11 13:20 ` John W. Linville
2009-05-11 22:23 ` Hin-Tak Leung
2009-05-11 22:23 ` Hin-Tak Leung
2009-05-06 18:03 ` DMA debug trace pointing to rtl8187 John W. Linville
2009-05-09 17:29 ` Larry Finger
2009-05-09 17:46 ` Eric Valette
2009-05-09 19:22 ` Eric Valette
2009-05-09 19:29 ` Greg KH
2009-05-09 20:19 ` Michael Buesch
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