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 6F525C4332F for ; Sun, 16 Oct 2022 07:17:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229600AbiJPHRF (ORCPT ); Sun, 16 Oct 2022 03:17:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229643AbiJPHRE (ORCPT ); Sun, 16 Oct 2022 03:17:04 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 195763ECF4 for ; Sun, 16 Oct 2022 00:17:04 -0700 (PDT) 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 dfw.source.kernel.org (Postfix) with ESMTPS id AAC8960AB3 for ; Sun, 16 Oct 2022 07:17:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C16AFC433D7; Sun, 16 Oct 2022 07:17:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1665904623; bh=T6vSQGervhVTnbSmCTws7kkx0hUkk9virDDS0znx/8I=; h=Subject:To:Cc:From:Date:From; b=VYZT08dvKBUlOD2IkF1/MDFI/1GDMeYVNcpNcnJPoNGOKRHvlVGq30YlPb6ZAW1IO jcJwNA8uTU4MG5uf1yyWIbwkebluexZLqv42uNC4c+RGghAKgjtQTe/xOGdFetyAGq l3e7tiuHKX/gb8i1J6JDWO1REz3LvuCsJjZg0CB4= Subject: FAILED: patch "[PATCH] can: kvaser_usb_leaf: Fix TX queue out of sync after restart" failed to apply to 4.9-stable tree To: anssi.hannula@bitwise.fi, extja@kvaser.com, mkl@pengutronix.de Cc: From: Date: Sun, 16 Oct 2022 09:17:41 +0200 Message-ID: <1665904661117144@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: 455561fb618f ("can: kvaser_usb_leaf: Fix TX queue out of sync after restart") 7259124eac7d ("can: kvaser_usb: Split driver into kvaser_usb_core.c and kvaser_usb_leaf.c") e0543f2479f8 ("can: kvaser_usb: Add SPDX GPL-2.0 license identifier") 2b049c150080 ("can: kvaser_usb: Fix typos") 6ba0b9294bca ("can: kvaser_usb: Improve logging messages") 7c4780146177 ("can: kvaser_usb: Refactor kvaser_usb_init_one()") 99ce1bc17462 ("can: kvaser_usb: Refactor kvaser_usb_get_endpoints()") 0e30619fd6fa ("can: kvaser_usb: Add pointer to struct usb_interface into struct kvaser_usb") 75d2b4c3e399 ("can: kvaser_usb: Replace USB timeout constants with one define") f741f938556d ("can: kvaser_usb: Rename message/msg to command/cmd") 237572220121 ("can: kvaser_usb: Remove unused commands and defines") deaa1c984be7 ("can: kvaser_usb: Remove unnecessary return") ffbdd9172ee2 ("can: usb: Kconfig/Makefile: sort alphabetically") 6ee00865ffe4 ("can: kvaser_usb: Increase correct stats counter in kvaser_usb_rx_can_msg()") 6aa8d5945502 ("can: kvaser_usb: cancel urb on -EPIPE and -EPROTO") 8bd13bd522ff ("can: kvaser_usb: ratelimit errors if incomplete messages are received") e84f44eb5523 ("can: kvaser_usb: Fix comparison bug in kvaser_usb_read_bulk_callback()") 435019b48033 ("can: kvaser_usb: free buf in error paths") e1d2d1329a57 ("can: kvaser_usb: Ignore CMD_FLUSH_QUEUE_REPLY messages") 8f65a923e6b6 ("can: kvaser_usb: Correct return value in printout") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 455561fb618fde40558776b5b8435f9420f335db Mon Sep 17 00:00:00 2001 From: Anssi Hannula Date: Mon, 10 Oct 2022 17:08:28 +0200 Subject: [PATCH] can: kvaser_usb_leaf: Fix TX queue out of sync after restart The TX queue seems to be implicitly flushed by the hardware during bus-off or bus-off recovery, but the driver does not reset the TX bookkeeping. Despite not resetting TX bookkeeping the driver still re-enables TX queue unconditionally, leading to "cannot find free context" / NETDEV_TX_BUSY errors if the TX queue was full at bus-off time. Fix that by resetting TX bookkeeping on CAN restart. Tested with 0bfd:0124 Kvaser Mini PCI Express 2xHS FW 4.18.778. Cc: stable@vger.kernel.org Fixes: 080f40a6fa28 ("can: kvaser_usb: Add support for Kvaser CAN/USB devices") Tested-by: Jimmy Assarsson Signed-off-by: Anssi Hannula Signed-off-by: Jimmy Assarsson Link: https://lore.kernel.org/all/20221010150829.199676-4-extja@kvaser.com Signed-off-by: Marc Kleine-Budde diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb.h b/drivers/net/can/usb/kvaser_usb/kvaser_usb.h index 841da29cef93..f6c0938027ec 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb.h +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb.h @@ -178,6 +178,8 @@ struct kvaser_usb_dev_cfg { extern const struct kvaser_usb_dev_ops kvaser_usb_hydra_dev_ops; extern const struct kvaser_usb_dev_ops kvaser_usb_leaf_dev_ops; +void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv); + int kvaser_usb_recv_cmd(const struct kvaser_usb *dev, void *cmd, int len, int *actual_len); diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c index c2bce6773adc..e91648ed7386 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c @@ -477,7 +477,7 @@ static void kvaser_usb_reset_tx_urb_contexts(struct kvaser_usb_net_priv *priv) /* This method might sleep. Do not call it in the atomic context * of URB completions. */ -static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) +void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv) { usb_kill_anchored_urbs(&priv->tx_submitted); kvaser_usb_reset_tx_urb_contexts(priv); diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c index 8e11cda85624..59c220ef3049 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c @@ -1426,6 +1426,8 @@ static int kvaser_usb_leaf_set_mode(struct net_device *netdev, switch (mode) { case CAN_MODE_START: + kvaser_usb_unlink_tx_urbs(priv); + err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP); if (err) return err;