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Message-ID: <20100901122059.5761802f@marrow.netinsight.se> Date: Wed, 1 Sep 2010 12:20:59 +0200 From: Simon Kagstrom <simon.kagstrom@...insight.net> To: Dave Jones <davej@...hat.com> Cc: netdev@...r.kernel.org Subject: Re: via-velocity dma-debug warnings again. (2.6.35.2) On Tue, 31 Aug 2010 13:21:07 -0400 Dave Jones <davej@...hat.com> wrote: > On Tue, Aug 31, 2010 at 11:10:52AM +0200, Simon Kagstrom wrote: > > On Mon, 30 Aug 2010 21:13:49 -0400 > > Dave Jones <davej@...hat.com> wrote: > > > > > I installed the Fedora 14 alpha, which is based on 2.6.35.2, and hit > > > the following trace.. > > > > > > WARNING: at lib/dma-debug.c:811 check_unmap+0x212/0x59b() > > > Hardware name: > > > via-velocity 0000:00:0e.0: DMA-API: device driver frees DMA memory with different size [device address=0x00000000194ba27e] [map size=66 bytes] [unmap size=182 bytes] > > > > I can't reproduce it here, but does the patch below help for you? > > It's looking good so far. It's been up 30 minutes and hasn't triggered yet > (normally it triggers very shortly after bootup) Sounds good. I'll think a bit more about this and submit the patch after that. I'm not really an expert on the subject, but with skb_headlen(), the size should be the same for pci_map_single and pci_unmap_single as far as I can tell. // Simon -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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