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=-10.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,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 7979BC04EBF for ; Wed, 5 Dec 2018 10:07:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3A674206B7 for ; Wed, 5 Dec 2018 10:07:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="HkgoKwHy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3A674206B7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728876AbeLEKHa (ORCPT ); Wed, 5 Dec 2018 05:07:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:45222 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728761AbeLEJkr (ORCPT ); Wed, 5 Dec 2018 04:40:47 -0500 Received: from sasha-vm.mshome.net (unknown [213.57.143.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1568820878; Wed, 5 Dec 2018 09:40:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544002846; bh=jCMRr+lxR8TGpNzuMhMAa6G7cNf3gaivT9ltZ3v4o/w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HkgoKwHyzJGL/lUQ9fWbXhvOYp4ItlTU0xQRioi0bmyOOGXZE4bHxOs6/feoBfoSt Gb/i9W14wXeyq4R26vCvbpIR+omW0SKD0E29XESQB8s/nJg97VfiY0qxGG04OFIMhr wj2DjY1S1wZRsqP4LoN/YPE8CsDQzK6sOtd3NN8g= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Bryan Whitehead , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 086/123] lan743x: fix return value for lan743x_tx_napi_poll Date: Wed, 5 Dec 2018 04:35:18 -0500 Message-Id: <20181205093555.5386-86-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181205093555.5386-1-sashal@kernel.org> References: <20181205093555.5386-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bryan Whitehead [ Upstream commit cc5922054131f9abefdc0622ae64fc55e6b2671d ] The lan743x driver, when under heavy traffic load, has been noticed to sometimes hang, or cause a kernel panic. Debugging reveals that the TX napi poll routine was returning the wrong value, 'weight'. Most other drivers return 0. And call napi_complete, instead of napi_complete_done. Additionally when creating the tx napi poll routine. Changed netif_napi_add, to netif_tx_napi_add. Updates for v3: changed 'fixes' tag to match defined format Updates for v2: use napi_complete, instead of napi_complete_done in lan743x_tx_napi_poll use netif_tx_napi_add, instead of netif_napi_add for registration of tx napi poll routine fixes: 23f0703c125b ("lan743x: Add main source files for new lan743x driver") Signed-off-by: Bryan Whitehead Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/microchip/lan743x_main.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c index 001b5f714c1b..5c3ac70abeca 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -1675,7 +1675,7 @@ static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight) netif_wake_queue(adapter->netdev); } - if (!napi_complete_done(napi, weight)) + if (!napi_complete(napi)) goto done; /* enable isr */ @@ -1684,7 +1684,7 @@ static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight) lan743x_csr_read(adapter, INT_STS); done: - return weight; + return 0; } static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx) @@ -1873,9 +1873,9 @@ static int lan743x_tx_open(struct lan743x_tx *tx) tx->vector_flags = lan743x_intr_get_vector_flags(adapter, INT_BIT_DMA_TX_ (tx->channel_number)); - netif_napi_add(adapter->netdev, - &tx->napi, lan743x_tx_napi_poll, - tx->ring_size - 1); + netif_tx_napi_add(adapter->netdev, + &tx->napi, lan743x_tx_napi_poll, + tx->ring_size - 1); napi_enable(&tx->napi); data = 0; -- 2.17.1