From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1763251AbbA3Wj6 (ORCPT <rfc822;w@1wt.eu>);
	Fri, 30 Jan 2015 17:39:58 -0500
Received: from one.firstfloor.org ([193.170.194.197]:35492 "EHLO
	one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1761196AbbA3Wj4 (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Fri, 30 Jan 2015 17:39:56 -0500
Date: Fri, 30 Jan 2015 23:39:53 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>, "H. Peter Anvin" <hpa@zytor.com>,
        Akinobu Mita <akinobu.mita@gmail.com>,
        Mathias Nyman <mathias.nyman@linux.intel.com>,
        Andi Kleen <andi@firstfloor.org>, Ingo Molnar <mingo@elte.hu>,
        Andrew Morton <akpm@linux-foundation.org>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
        x86@kernel.org, linux-usb@vger.kernel.org
Subject: Re: [PATCH] pci-dma: Fix x86 dma_alloc_coherent to fully clear all
 pages returned
Message-ID: <20150130223953.GK3552@two.firstfloor.org>
References: <1422647641.9530.2.camel@schen9-desk2.jf.intel.com>
 <20150130195853.GA17115@kroah.com>
 <1422655318.9530.15.camel@schen9-desk2.jf.intel.com>
 <20150130220747.GA21792@kroah.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20150130220747.GA21792@kroah.com>
User-Agent: Mutt/1.5.20 (2009-06-14)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

> We don't "need" any backward compatility, why not fix the broken drivers
> that are using memory outside of what they are asking for?  That's not
> ok no matter what, right?

How would you find them all?

We don't even know which place in XHCI is the culprit here.

Yes iff you can find them it would be good to fix.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.