From nobody Wed Sep 3 06:28:09 2025 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 D1D10FA374F for ; Mon, 24 Oct 2022 12:41:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231345AbiJXMkr (ORCPT ); Mon, 24 Oct 2022 08:40:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232012AbiJXMgq (ORCPT ); Mon, 24 Oct 2022 08:36:46 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C3D288982C; Mon, 24 Oct 2022 05:06:10 -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 ams.source.kernel.org (Postfix) with ESMTPS id CEB98B811C0; Mon, 24 Oct 2022 12:03:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39967C433D6; Mon, 24 Oct 2022 12:03:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666613006; bh=Kzis1vLhezwehNxVB+MAMkeHuzcWMxACM/LeTgmHF4I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=q9nKZmr1BlrXFhLC9us8I+JsMl31x0b8DGn5b46wnRnOAYQbLvGFU50Q6/lzf+aq0 tobXf4lRVCvmNPGjz0XErnezM9BeHe+kAxL8zqA6jdSn2M1OEzXWvKtpUncIBPSxtU s51SksCwiw1PfjnAsLgEJ7RViKU0/imN6O7+2HKA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marc Kleine-Budde , Oliver Hartkopp , Ziyang Xuan , Sasha Levin Subject: [PATCH 4.19 185/229] can: bcm: check the result of can_send() in bcm_can_tx() Date: Mon, 24 Oct 2022 13:31:44 +0200 Message-Id: <20221024113005.097019844@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221024112959.085534368@linuxfoundation.org> References: <20221024112959.085534368@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Ziyang Xuan [ Upstream commit 3fd7bfd28cfd68ae80a2fe92ea1615722cc2ee6e ] If can_send() fail, it should not update frames_abs counter in bcm_can_tx(). Add the result check for can_send() in bcm_can_tx(). Suggested-by: Marc Kleine-Budde Suggested-by: Oliver Hartkopp Signed-off-by: Ziyang Xuan Link: https://lore.kernel.org/all/9851878e74d6d37aee2f1ee76d68361a46f89458.= 1663206163.git.william.xuanziyang@huawei.com Acked-by: Oliver Hartkopp Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- net/can/bcm.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/net/can/bcm.c b/net/can/bcm.c index 3c825b158fb5..74e555a22de7 100644 --- a/net/can/bcm.c +++ b/net/can/bcm.c @@ -273,6 +273,7 @@ static void bcm_can_tx(struct bcm_op *op) struct sk_buff *skb; struct net_device *dev; struct canfd_frame *cf =3D op->frames + op->cfsiz * op->currframe; + int err; =20 /* no target device? =3D> exit */ if (!op->ifindex) @@ -297,11 +298,11 @@ static void bcm_can_tx(struct bcm_op *op) /* send with loopback */ skb->dev =3D dev; can_skb_set_owner(skb, op->sk); - can_send(skb, 1); + err =3D can_send(skb, 1); + if (!err) + op->frames_abs++; =20 - /* update statistics */ op->currframe++; - op->frames_abs++; =20 /* reached last frame? */ if (op->currframe >=3D op->nframes) --=20 2.35.1