From patchwork Thu Dec 8 14:21:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Yingliang X-Patchwork-Id: 13068476 X-Patchwork-Delegate: kuba@kernel.org 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 BEB99C4332F for ; Thu, 8 Dec 2022 14:26:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230037AbiLHO0R (ORCPT ); Thu, 8 Dec 2022 09:26:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230210AbiLHOZb (ORCPT ); Thu, 8 Dec 2022 09:25:31 -0500 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 873DD934F6 for ; Thu, 8 Dec 2022 06:24:45 -0800 (PST) Received: from dggpemm500007.china.huawei.com (unknown [172.30.72.56]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4NSbxP5fNHzJqPK; Thu, 8 Dec 2022 22:23:53 +0800 (CST) Received: from huawei.com (10.175.103.91) by dggpemm500007.china.huawei.com (7.185.36.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Thu, 8 Dec 2022 22:24:42 +0800 From: Yang Yingliang To: CC: , , , , , Yang Yingliang , Michal Simek , John Linn , Sadanand M , Harini Katakam , Subject: [PATCH net v3 1/4] net: emaclite: don't call dev_kfree_skb() under spin_lock_irqsave() Date: Thu, 8 Dec 2022 22:21:44 +0800 Message-ID: <20221208142147.2376671-2-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221208142147.2376671-1-yangyingliang@huawei.com> References: <20221208142147.2376671-1-yangyingliang@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemm500007.china.huawei.com (7.185.36.183) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org It is not allowed to call kfree_skb() or consume_skb() from hardware interrupt context or with hardware interrupts being disabled. It should use dev_kfree_skb_irq() or dev_consume_skb_irq() instead. The difference between them is free reason, dev_kfree_skb_irq() means the SKB is dropped in error and dev_consume_skb_irq() means the SKB is consumed in normal. In this case, dev_kfree_skb() is called in xemaclite_tx_timeout() to drop the SKB, when tx timeout, so replace it with dev_kfree_skb_irq(). Fixes: bb81b2ddfa19 ("net: add Xilinx emac lite device driver") Signed-off-by: Yang Yingliang --- drivers/net/ethernet/xilinx/xilinx_emaclite.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c index a3967f8de417..a1e1387ea84e 100644 --- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c +++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c @@ -536,7 +536,7 @@ static void xemaclite_tx_timeout(struct net_device *dev, unsigned int txqueue) xemaclite_enable_interrupts(lp); if (lp->deferred_skb) { - dev_kfree_skb(lp->deferred_skb); + dev_kfree_skb_irq(lp->deferred_skb); lp->deferred_skb = NULL; dev->stats.tx_errors++; }