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 078CEC4321E for ; Sun, 9 Oct 2022 22:56:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233773AbiJIWz6 (ORCPT ); Sun, 9 Oct 2022 18:55:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233904AbiJIWyQ (ORCPT ); Sun, 9 Oct 2022 18:54:16 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F5183A142; Sun, 9 Oct 2022 15:29:18 -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 CCEB3B80DE4; Sun, 9 Oct 2022 22:25:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4BDF9C433B5; Sun, 9 Oct 2022 22:25:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665354331; bh=Kzis1vLhezwehNxVB+MAMkeHuzcWMxACM/LeTgmHF4I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ko5vkSK+EwoljOPwOFLOuB8Kak7l/bkHSpVshsKrYHVa/OPr+/r0Kce/xctsRo2e5 HbJ4qK1h9ENhAkZCZerLieAzDeg4jXnOE8e50Dkp6003ipSbROApGpm6K6GqecvHLa Y3bNcGUn2aGZwgTIkR7JAIAhkUW+ZaFENYSDUgSTWk5c9spMBm52cswUFH4ukH3HfR qIE7BSgO590xadjjcei/poMnDpZB2h6uCIiSUNjiZcfrxm1ABF2GHmttWTkUAoEOSo h2GzdhSIoxxYM9Xx4OaEclhTEV5VS6IhbC125mvbKJh4eZhEFWZ9O8gfGowYlUZG15 Xa0l5skfIW7GQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ziyang Xuan , Marc Kleine-Budde , Oliver Hartkopp , Sasha Levin , davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-can@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 17/25] can: bcm: check the result of can_send() in bcm_can_tx() Date: Sun, 9 Oct 2022 18:24:22 -0400 Message-Id: <20221009222436.1219411-17-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221009222436.1219411-1-sashal@kernel.org> References: <20221009222436.1219411-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org 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 = op->frames + op->cfsiz * op->currframe; + int err; /* no target device? => exit */ if (!op->ifindex) @@ -297,11 +298,11 @@ static void bcm_can_tx(struct bcm_op *op) /* send with loopback */ skb->dev = dev; can_skb_set_owner(skb, op->sk); - can_send(skb, 1); + err = can_send(skb, 1); + if (!err) + op->frames_abs++; - /* update statistics */ op->currframe++; - op->frames_abs++; /* reached last frame? */ if (op->currframe >= op->nframes) -- 2.35.1