From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Pellegrini Subject: Re: =?utf-8?b?cGNoX2Nhbjo=?= Data transmission stops after dropped packet Date: Fri, 23 Nov 2012 14:27:04 +0000 (UTC) Message-ID: References: <50A4EA87.9020206@grandegger.com> <50A55C65.2020003@grandegger.com> <50A95FC1.3050907@grandegger.com> <50AA4FB3.7070009@grandegger.com> <50AA5EE6.6060105@grandegger.com> <50AA86DB.7000506@grandegger.com> <50AAA8C8.2080504@grandegger.com> <50ABABDE.8060503@grandegger.com> <50ABF09C.8040303@grandegger.com> <50ACABE2.2020306@grandegger.com>

<50ACF9C0.8050206@grandegger.com> <50AD042B.3020305@grandegger.com> <50AD319E.2000209@grandegger.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org ([80.91.229.3]:49550 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751982Ab2KWO1W (ORCPT ); Fri, 23 Nov 2012 09:27:22 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1TbuE4-0006rh-5s for linux-can@vger.kernel.org; Fri, 23 Nov 2012 15:27:28 +0100 Received: from 96.45.208.254 ([96.45.208.254]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 23 Nov 2012 15:27:28 +0100 Received: from mikep86 by 96.45.208.254 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 23 Nov 2012 15:27:28 +0100 Sender: linux-can-owner@vger.kernel.org List-ID: To: linux-can@vger.kernel.org Michael Pellegrini gmail.com> writes: > My application has been running strong for about 45 minutes and counting with > this driver. I will leave the system running over Thanksgiving as a long-term > test. The driver has unfortunately failed the long-term test. When I checked the PCH-System this morning, it had hit the transmission problem again. Dmesg output is: [234700.232657] c_can_isr: irqstatus=0x6 [234700.232712] c_can_isr: irqstatus=0x6 [234700.232765] c_can_isr: irqstatus=0x6 [234700.232818] c_can_isr: irqstatus=0x6 [234700.232873] c_can_isr: irqstatus=0x6 [234700.232928] c_can_isr: irqstatus=0x6 [234700.232985] c_can_isr: irqstatus=0x6 [234700.233041] c_can_isr: irqstatus=0x6 [234700.233096] c_can_isr: irqstatus=0x6 [234700.233151] c_can_isr: irqstatus=0x6 [234700.233203] c_can_isr: irqstatus=0x6 [234700.233257] c_can_isr: irqstatus=0x6 [234700.233312] c_can_isr: irqstatus=0x6 [234700.233369] c_can_isr: irqstatus=0x6 [234700.233424] c_can_isr: irqstatus=0x6 [234700.233478] c_can_isr: irqstatus=0x6 "ip -d -s link show can0" output is: 8: can0: mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10 link/can can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 0 bitrate 250000 sample-point 0.875 tq 500 prop-seg 3 phase-seg1 3 phase-seg2 1 sjw 1 c_can: tseg1 2..16 tseg2 1..8 sjw 1..4 brp 1..1024 brp-inc 1 clock 50000000 re-started bus-errors arbit-lost error-warn error-pass bus-off 0 0 0 0 0 0 RX: bytes packets errors dropped overrun mcast 102603 43967 0 0 0 0 TX: bytes packets errors dropped carrier collsns 4487315 1082899 0 0 0 0 I tried sending a message with "cansend can0 123#abcdef" and got the error message "write: No buffer space available". Additionally, data reception is broken. I can confirm via the CAN Monitor system that the External Node system is sending messages which the PCH-System should be receiving. However, the RX count is not increasing and "candump any,0:0,#FFFFFFFF" does not show any messages being transmitted or received on the interface. Resetting the interface fixes data transmission and reception. After the reset, "ip -d -s link show can0" output is: 8: can0: mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10 link/can can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 0 bitrate 250000 sample-point 0.875 tq 500 prop-seg 3 phase-seg1 3 phase-seg2 1 sjw 1 c_can: tseg1 2..16 tseg2 1..8 sjw 1..4 brp 1..1024 brp-inc 1 clock 50000000 re-started bus-errors arbit-lost error-warn error-pass bus-off 0 0 0 0 0 0 RX: bytes packets errors dropped overrun mcast 103148 44200 0 0 0 0 TX: bytes packets errors dropped carrier collsns 4487318 1082900 0 13 0 0 After the reset, dmesg output is: [235689.911732] c_can_isr: irqstatus=0x7 [235690.358052] c_can_isr: irqstatus=0x8000 [235690.358111] c_can_isr: irqstatus=0x8 [235690.358282] c_can_isr: irqstatus=0x9 [235690.975410] c_can_isr: irqstatus=0x8000 [235690.975466] c_can_isr: irqstatus=0x1 [235691.420692] c_can_isr: irqstatus=0x8000 [235691.420749] c_can_isr: irqstatus=0x2 [235691.420899] c_can_isr: irqstatus=0x8000 [235691.420937] c_can_isr: irqstatus=0x3 [235692.038095] c_can_isr: irqstatus=0x8000 [235692.038151] c_can_isr: irqstatus=0x4 [235692.483325] c_can_isr: irqstatus=0x8000 [235692.483381] c_can_isr: irqstatus=0x5 [235692.483548] c_can_isr: irqstatus=0x8000 [235692.483587] c_can_isr: irqstatus=0x6 [235693.100729] c_can_isr: irqstatus=0x8000 [235693.100785] c_can_isr: irqstatus=0x7 [235693.545970] c_can_isr: irqstatus=0x8000 [235693.546027] c_can_isr: irqstatus=0x8 [235693.546195] c_can_isr: irqstatus=0x9 - Mike