From patchwork Mon Mar 29 07:57:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 411319 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01730C433EA for ; Mon, 29 Mar 2021 08:38:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DED5261554 for ; Mon, 29 Mar 2021 08:38:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233631AbhC2Ii0 (ORCPT ); Mon, 29 Mar 2021 04:38:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:55600 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233715AbhC2Ifr (ORCPT ); Mon, 29 Mar 2021 04:35:47 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5F7A0619E8; Mon, 29 Mar 2021 08:35:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617006920; bh=2Yymh7UoYzvt39/OBVceDQNNT0AXD3CzFp1nOlcBs48=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tK9OfLf3frSNbe5kXSiYDwXQh3V2jOd026P/oU4512GFKxS3zM2Z2tGQ5hPGMzujb 387uSPOl6l6VVBAEcFUvNNrN5M6H73E4erANNtc/oU2gSy54KJcGqc8c+oTyjqcwdX ehMR6Ber1FoDw2dUExidV2zX3J/qInPhZr098I/Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jimmy Assarsson , Marc Kleine-Budde , Sasha Levin Subject: [PATCH 5.11 151/254] can: kvaser_pciefd: Always disable bus load reporting Date: Mon, 29 Mar 2021 09:57:47 +0200 Message-Id: <20210329075638.169218147@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075633.135869143@linuxfoundation.org> References: <20210329075633.135869143@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jimmy Assarsson [ Upstream commit 7c6e6bce08f918b64459415f58061d4d6df44994 ] Under certain circumstances, when switching from Kvaser's linuxcan driver (kvpciefd) to the SocketCAN driver (kvaser_pciefd), the bus load reporting is not disabled. This is flooding the kernel log with prints like: [3485.574677] kvaser_pciefd 0000:02:00.0: Received unexpected packet type 0x00000009 Always put the controller in the expected state, instead of assuming that bus load reporting is inactive. Note: If bus load reporting is enabled when the driver is loaded, you will still get a number of bus load packages (and printouts), before it is disabled. Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices") Link: https://lore.kernel.org/r/20210309091724.31262-1-jimmyassarsson@gmail.com Signed-off-by: Jimmy Assarsson Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- drivers/net/can/kvaser_pciefd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c index 969cedb9b0b6..0d77c60f775e 100644 --- a/drivers/net/can/kvaser_pciefd.c +++ b/drivers/net/can/kvaser_pciefd.c @@ -57,6 +57,7 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices"); #define KVASER_PCIEFD_KCAN_STAT_REG 0x418 #define KVASER_PCIEFD_KCAN_MODE_REG 0x41c #define KVASER_PCIEFD_KCAN_BTRN_REG 0x420 +#define KVASER_PCIEFD_KCAN_BUS_LOAD_REG 0x424 #define KVASER_PCIEFD_KCAN_BTRD_REG 0x428 #define KVASER_PCIEFD_KCAN_PWM_REG 0x430 /* Loopback control register */ @@ -949,6 +950,9 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie) timer_setup(&can->bec_poll_timer, kvaser_pciefd_bec_poll_timer, 0); + /* Disable Bus load reporting */ + iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_BUS_LOAD_REG); + tx_npackets = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NPACKETS_REG); if (((tx_npackets >> KVASER_PCIEFD_KCAN_TX_NPACKETS_MAX_SHIFT) &