Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756565Ab0DNS1s (ORCPT ); Wed, 14 Apr 2010 14:27:48 -0400 Received: from ey-out-2122.google.com ([74.125.78.27]:31052 "EHLO ey-out-2122.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756542Ab0DNS1q convert rfc822-to-8bit (ORCPT ); Wed, 14 Apr 2010 14:27:46 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=rmBhkIj7prF3QVSJUKjiFYvZXsAF9TY6LMBNdOKZNHZ/PvfiW6UfKTWs8OMA4/REw+ yaZekM54tDTDUR6/+fi/kI3AETHsqfvH94AEe1amYot0GEbcNlysuf8kZLu53Yb7Nhcp GR3PJgg3TTj71svLkBdhTHPYrHVKKtqJZumyg= MIME-Version: 1.0 In-Reply-To: References: Date: Wed, 14 Apr 2010 19:27:42 +0100 Message-ID: Subject: Re: USB transfer_buffer allocations on 64bit systems From: Pedro Ribeiro To: Alan Stern Cc: Daniel Mack , USB list , Andi Kleen , Kernel development list , Andrew Morton , Greg KH Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1012 Lines: 26 On 14 April 2010 19:23, Alan Stern wrote: > On Wed, 14 Apr 2010, Pedro Ribeiro wrote: > >> The best way to trigger the issue is to connect a dib0700 based DVB >> adapter. All you need is to connect it. Since it polls for the remote >> control every 50 msec, it causes a constant interference. Beware that >> on 2.6.34 this behaviour has been corrected. Other DVB adapters may >> trigger the same issue if they also poll constatly for the rc. > > Your computer has two EHCI controllers, doesn't it? ?Can you plug the > DVB into a different USB bus from the audio device? ?If you do, does > the interference still occur? > > Alan Stern > > It does not matter on which ports I plug into, even if in different buses not sharing IRQ's. Pedro -- 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/