Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753379AbbBRUpe (ORCPT ); Wed, 18 Feb 2015 15:45:34 -0500 Received: from iolanthe.rowland.org ([192.131.102.54]:52273 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752330AbbBRUpc (ORCPT ); Wed, 18 Feb 2015 15:45:32 -0500 Date: Wed, 18 Feb 2015 15:45:31 -0500 (EST) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: Tim Chen cc: Sergei Shtylyov , Greg Kroah-Hartman , Jiri Slaby , "H. Peter Anvin" , Akinobu Mita , Mathias Nyman , Andi Kleen , Ingo Molnar , Andrew Morton , Marek Szyprowski , Thomas Gleixner , , , , stable Subject: Re: [PATCH] pci-dma: Fix x86 dma_alloc_coherent to fully clear all pages returned In-Reply-To: <1424290743.9530.122.camel@schen9-desk2.jf.intel.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 948 Lines: 27 On Wed, 18 Feb 2015, Tim Chen wrote: > > Have you tried doing the experiments I suggested in > > > > http://marc.info/?l=linux-usb&m=142272448620716&w=2 > > > > to determine where the problem occurs? > > > > I was bogged down with other things lately and I haven't got a chance to > test that. But as you said, there's very few places where xhci > call this memory allocation. So I think the problem has been fairly > narrowed down for the XHCI folks. I disagree. _You_ reported the error. How can you expect other people to figure out where it is with no help from you? I looked briefly at the xhci-hcd DMA allocation code. It does not contain any obvious mistakes. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/