From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8677C4332F for ; Sun, 11 Dec 2022 09:53:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230098AbiLKJxd (ORCPT ); Sun, 11 Dec 2022 04:53:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230081AbiLKJxb (ORCPT ); Sun, 11 Dec 2022 04:53:31 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2FE911180A for ; Sun, 11 Dec 2022 01:53:30 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 9377CCE0B07 for ; Sun, 11 Dec 2022 09:53:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A428C433D2; Sun, 11 Dec 2022 09:53:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670752406; bh=HlKOTE6JA0QR1ZfAuxS1RuikRvaY8R8sPvZYSWjLsB4=; h=Subject:To:Cc:From:Date:From; b=Wp/tfp2IbdJMU27ITEds9nz2oig0Kn8+v/DZUboo5hKko2Vq53f2QL7ayY6f9NPTA Bk5iXwJi7uAvPg23i1Yn1+wAludGFT+StXYsy9imPxEhRDr1aGl+oo38mBypSgJeJ2 8McFH5WKKSTCOAdIhW93cCN7dzmZ1W0XEqynDWJM= Subject: FAILED: patch "[PATCH] can: esd_usb: Allow REC and TEC to return to zero" failed to apply to 4.9-stable tree To: frank.jungclaus@esd.eu, mkl@pengutronix.de Cc: From: Date: Sun, 11 Dec 2022 10:53:11 +0100 Message-ID: <1670752391249166@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . Possible dependencies: 918ee4911f7a ("can: esd_usb: Allow REC and TEC to return to zero") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 918ee4911f7a41fb4505dff877c1d7f9f64eb43e Mon Sep 17 00:00:00 2001 From: Frank Jungclaus Date: Wed, 30 Nov 2022 21:22:42 +0100 Subject: [PATCH] can: esd_usb: Allow REC and TEC to return to zero We don't get any further EVENT from an esd CAN USB device for changes on REC or TEC while those counters converge to 0 (with ecc == 0). So when handling the "Back to Error Active"-event force txerr = rxerr = 0, otherwise the berr-counters might stay on values like 95 forever. Also, to make life easier during the ongoing development a netdev_dbg() has been introduced to allow dumping error events send by an esd CAN USB device. Fixes: 96d8e90382dc ("can: Add driver for esd CAN-USB/2 device") Signed-off-by: Frank Jungclaus Link: https://lore.kernel.org/all/20221130202242.3998219-2-frank.jungclaus@esd.eu Cc: stable@vger.kernel.org Signed-off-by: Marc Kleine-Budde diff --git a/drivers/net/can/usb/esd_usb.c b/drivers/net/can/usb/esd_usb.c index 81b88e9e5bdc..42323f5e6f3a 100644 --- a/drivers/net/can/usb/esd_usb.c +++ b/drivers/net/can/usb/esd_usb.c @@ -234,6 +234,10 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, u8 rxerr = msg->msg.rx.data[2]; u8 txerr = msg->msg.rx.data[3]; + netdev_dbg(priv->netdev, + "CAN_ERR_EV_EXT: dlc=%#02x state=%02x ecc=%02x rec=%02x tec=%02x\n", + msg->msg.rx.dlc, state, ecc, rxerr, txerr); + skb = alloc_can_err_skb(priv->netdev, &cf); if (skb == NULL) { stats->rx_dropped++; @@ -260,6 +264,8 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv, break; default: priv->can.state = CAN_STATE_ERROR_ACTIVE; + txerr = 0; + rxerr = 0; break; } } else {