Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752526Ab3CRMtM (ORCPT ); Mon, 18 Mar 2013 08:49:12 -0400 Received: from mga09.intel.com ([134.134.136.24]:8995 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752099Ab3CRMtD (ORCPT ); Mon, 18 Mar 2013 08:49:03 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,865,1355126400"; d="scan'208";a="281005826" Date: Mon, 18 Mar 2013 12:48:41 +0000 From: Chris Wilson To: Jiri Kosina Cc: linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, Shawn Starr , Daniel Vetter Subject: Re: [PATCH] drm/i915: Flush writes to GMBUS registers Message-ID: <20130318124841.GA3995@cantiga.alporthouse.com> Mail-Followup-To: Chris Wilson , Jiri Kosina , linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, Shawn Starr , Daniel Vetter References: <1363605185-4030-1-git-send-email-chris@chris-wilson.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1198 Lines: 28 On Mon, Mar 18, 2013 at 12:51:45PM +0100, Jiri Kosina wrote: > On Mon, 18 Mar 2013, Chris Wilson wrote: > > > If we do not complete the writes to the GMBUS registers, they remain > > active for an indefinite period of time afterwards, even causing > > spurious interrupts on gm45. > > > > Signed-off-by: Chris Wilson > > Link: http://lkml.kernel.org/r/alpine.LNX.2.00.1303151424140.9529@pobox.suse.cz > > Cc: Shawn Starr > > Cc: Jiri Kosina > > Cc: Daniel Vetter > > Unfortunately I can't provide my Tested-by or Acked-by for this, as I am > still seeing the "nobody cared" for irq 16 with this patch applied. The message reappeared on the third reboot. Perhaps an indicator that it is a timing issue. I guess the sensible approach then is to exclude gen4 from the whitelist for gmbus irqs. -Chris -- Chris Wilson, Intel Open Source Technology Centre -- 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/