Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756637Ab0LQWA2 (ORCPT ); Fri, 17 Dec 2010 17:00:28 -0500 Received: from hqemgate03.nvidia.com ([216.228.121.140]:8074 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755824Ab0LQWA1 (ORCPT ); Fri, 17 Dec 2010 17:00:27 -0500 X-PGP-Universal: processed; by hqnvupgp03.nvidia.com on Fri, 17 Dec 2010 13:58:59 -0800 From: Robert Morell To: David Brownell , Greg Kroah-Hartman , Benoit Goby , Alan Stern , Sarah Sharp , Matthew Wilcox , Ming Lei , Jacob Pan Cc: Olof Johansson , Erik Gilling , Colin Cross , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC] Align tegra-ehci DMA transfers to 32B Date: Fri, 17 Dec 2010 13:58:47 -0800 Message-Id: <1292623129-26361-1-git-send-email-rmorell@nvidia.com> X-Mailer: git-send-email 1.7.2.2 X-NVConfidentiality: public Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 821 Lines: 15 This small set of patches fixes an issue where DMA from the tegra EHCI controller could be corrupted. It was most commonly seen with USB network adapters, though in theory it could happen with any USB traffic. (Note: An attempt was made to fix this with commit 367c3aab, which set NET_IP_ALIGN to 0 and NET_SKB_PAD to 32. Unfortunately, not all network drivers honor them (presumably since these are intended as optimizations rather than hard rules). This does mean that properly-written network drivers should fall through this code with very little overhead, however.) -- 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/