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Date: Wed, 4 Aug 2010 23:18:16 +0900 From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> To: Joerg.Roedel@....com Cc: fujita.tomonori@....ntt.co.jp, subrata@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org, Linuxppc-dev@...abs.org, grant.likely@...retlab.ca, James.Bottomley@...e.de, brking@...ux.vnet.ibm.com, tj@...nel.org, rcj@...ux.vnet.ibm.com, devilbis@...ibm.com, santil@...ibm.com, sleddog@...ibm.com, sachinp@...ux.vnet.ibm.com, dipraksh@...ux.vnet.ibm.com Subject: Re: 2.6.35-stable/ppc64/p7: Badness at lib/dma-debug.c:902, Call Trace & Instruction Dump during boot On Wed, 4 Aug 2010 15:16:34 +0200 "Roedel, Joerg" <Joerg.Roedel@....com> wrote: > On Mon, Aug 02, 2010 at 07:55:03AM -0400, FUJITA Tomonori wrote: > > I guess that this driver does a partial sync with > > dma_sync_single_for_* API. dma-debug can't handle it properly. It's > > likely that this is a false warning. > > If this turns out to be true it is not trivial to fix. I prepare a patch > to test for you. I've not looked at the details of this driver, but there are drivers that do such. So dma-debug needs to be fixed anyway; you can't assume that a DMA address that dma_map_single returned is passed to dma_sync_single_for API. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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