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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 7312AC432C0 for ; Tue, 3 Dec 2019 23:11:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 413512068E for ; Tue, 3 Dec 2019 23:11:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575414665; bh=plkKtLAsyDuFJg/YpcbFdJkboKAp8rYwkIi9sDfq+jc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Vj3ezwCMlYLWjCuEyqBGlC7xsJvriZK8PxpBVgZMQpblNGp1OXe84IykLv6q4WPcS yB48EF6JCpZM04n6wsQZT2uAp3i4IiY1pa9bh+sdVwLkxWcRLaSfYuTfb/Hp+75beN 3hHpLojjdb3XM0dy0coL+2laPbMDkUA0UBKYOmWU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728998AbfLCXLE (ORCPT ); Tue, 3 Dec 2019 18:11:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:56198 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728574AbfLCWlj (ORCPT ); Tue, 3 Dec 2019 17:41:39 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D25AE20684; Tue, 3 Dec 2019 22:41:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575412899; bh=plkKtLAsyDuFJg/YpcbFdJkboKAp8rYwkIi9sDfq+jc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fLyp/TnhBhbDmQ98czl1PnLXXrb0VyxZGE+vKdVwldvvJOBc4deX0ldK4+qXUONXV PXM06ZX6upgMuRufy/J0sjbZIKvfOmHAktIuKgcbxr0O7BTzDTLfH+QIZbiu2LcCzJ 94ogWlwDdtKmaJGBREOaGfxO4IQuUM8No6PYw6Bc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Martin=20Hundeb=C3=B8ll?= , Marc Kleine-Budde , Sasha Levin Subject: [PATCH 5.3 059/135] can: flexcan: increase error counters if skb enqueueing via can_rx_offload_queue_sorted() fails Date: Tue, 3 Dec 2019 23:34:59 +0100 Message-Id: <20191203213021.829145542@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191203213005.828543156@linuxfoundation.org> References: <20191203213005.828543156@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Marc Kleine-Budde [ Upstream commit 758124335a9dd649ab820bfb5b328170919ee7dc ] The call to can_rx_offload_queue_sorted() may fail and return an error (in the current implementation due to resource shortage). The passed skb is consumed. This patch adds incrementing of the appropriate error counters to let the device statistics reflect that there's a problem. Reported-by: Martin Hundebøll Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- drivers/net/can/flexcan.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index 56fa98d7aa90c..a4f0fa94d136a 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -658,6 +658,7 @@ static void flexcan_irq_bus_err(struct net_device *dev, u32 reg_esr) struct can_frame *cf; bool rx_errors = false, tx_errors = false; u32 timestamp; + int err; timestamp = priv->read(®s->timer) << 16; @@ -706,7 +707,9 @@ static void flexcan_irq_bus_err(struct net_device *dev, u32 reg_esr) if (tx_errors) dev->stats.tx_errors++; - can_rx_offload_queue_sorted(&priv->offload, skb, timestamp); + err = can_rx_offload_queue_sorted(&priv->offload, skb, timestamp); + if (err) + dev->stats.rx_fifo_errors++; } static void flexcan_irq_state(struct net_device *dev, u32 reg_esr) @@ -719,6 +722,7 @@ static void flexcan_irq_state(struct net_device *dev, u32 reg_esr) int flt; struct can_berr_counter bec; u32 timestamp; + int err; timestamp = priv->read(®s->timer) << 16; @@ -750,7 +754,9 @@ static void flexcan_irq_state(struct net_device *dev, u32 reg_esr) if (unlikely(new_state == CAN_STATE_BUS_OFF)) can_bus_off(dev); - can_rx_offload_queue_sorted(&priv->offload, skb, timestamp); + err = can_rx_offload_queue_sorted(&priv->offload, skb, timestamp); + if (err) + dev->stats.rx_fifo_errors++; } static inline struct flexcan_priv *rx_offload_to_priv(struct can_rx_offload *offload) -- 2.20.1