From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Stein Subject: Re: [PATCH] c_can: Add support for eg20t (pch_can) Date: Mon, 07 Apr 2014 14:58:08 +0200 Message-ID: <8704553.bJQG1oassy@ws-stein> References: <1396534451-9654-1-git-send-email-alexander.stein@systec-electronic.com> <3160314.uNhSqa4Py1@ws-stein> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: Received: from webbox1416.server-home.net ([77.236.96.61]:41631 "EHLO webbox1416.server-home.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755174AbaDGM7Z (ORCPT ); Mon, 7 Apr 2014 08:59:25 -0400 In-Reply-To: Sender: linux-can-owner@vger.kernel.org List-ID: To: Thomas Gleixner Cc: Marc Kleine-Budde , Wolfgang Grandegger , linux-can@vger.kernel.org On Monday 07 April 2014 14:56:19, Thomas Gleixner wrote: > On Mon, 7 Apr 2014, Alexander Stein wrote: > > > Hello Thomas, > > > > On Monday 07 April 2014 14:34:17, Thomas Gleixner wrote: > > > > I'm currently trying to locate problem causes. Using your new set of patches on the tag linux-can-fixes-for-3.15-20140401 I lot of lost messages. > > > > Using bisect it seems that c0a9f4d39 "can: c_can: Reduce register access" introduced this problem on my hardware. Before that I only see switched messages occasionally. > > > > > > > > > > Does the last patch which disables the RX buffer split still have that > > > issue? > > > > Regardless of CAN_C_CAN_STRICT_FRAME_ORDERING I'm still losing messages. > > BTW: I need the following patch to be able to use CAN_C_CAN_STRICT_FRAME_ORDERING: > > Grr. True. > > So if you disable CAN_C_CAN_STRICT_FRAME_ORDERING you still lose frames? Yep, even on the commits before. But not from commit c0a9f4d39 on backwards. Regards, Alexander -- Dipl.-Inf. Alexander Stein SYS TEC electronic GmbH Am Windrad 2 08468 Heinsdorfergrund Tel.: 03765 38600-1156 Fax: 03765 38600-4100 Email: alexander.stein@systec-electronic.com Website: www.systec-electronic.com Managing Director: Dipl.-Phys. Siegmar Schmidt Commercial registry: Amtsgericht Chemnitz, HRB 28082