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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 9F75CC47254 for ; Fri, 8 May 2020 13:01:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7825A20720 for ; Fri, 8 May 2020 13:01:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588942903; bh=mrRr83ZEhZRtXkTrCaGAISe1GATIbg6kouguMFDRez0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yQHK4C6UqR+zDJ4cAmiNzP7+ZGohHWsfYvJGkK9p8bNjaAWyv19/uFkGtwjlK1U9N 4CyY1NhykbS9pxljLH7XF4D8mEUkAimL1HEa/YDjsn45KRc5wZz3ouBgXY3JoKrqHh kcFTlDqnzmEGuQrCXoJHuEeiLHfym5CREtLM1BIM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729677AbgEHMvk (ORCPT ); Fri, 8 May 2020 08:51:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:60794 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729921AbgEHMvi (ORCPT ); Fri, 8 May 2020 08:51:38 -0400 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 0F9D424964; Fri, 8 May 2020 12:51:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588942297; bh=mrRr83ZEhZRtXkTrCaGAISe1GATIbg6kouguMFDRez0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zm2dYq3qO0GL4nhbtrpF5QQpKoR6gGkf+hawPh6ZHEROT9JoE9s4GUTLmncp/2G2q yCRYNqxsL1xBaXL1/FoYFQa3ZDvbn1wiMglOkyLXCMMT36qOCjFaBgqLOvRVlgfjjz TqCLNwCljhsMRaWW9ofqaK1I16UvTB+2HMZLgJic= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Doug Berger , Florian Fainelli , "David S. Miller" , Sasha Levin Subject: [PATCH 4.19 21/32] net: systemport: suppress warnings on failed Rx SKB allocations Date: Fri, 8 May 2020 14:35:34 +0200 Message-Id: <20200508123037.799883564@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200508123034.886699170@linuxfoundation.org> References: <20200508123034.886699170@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Doug Berger [ Upstream commit 3554e54a46125030c534820c297ed7f6c3907e24 ] The driver is designed to drop Rx packets and reclaim the buffers when an allocation fails, and the network interface needs to safely handle this packet loss. Therefore, an allocation failure of Rx SKBs is relatively benign. However, the output of the warning message occurs with a high scheduling priority that can cause excessive jitter/latency for other high priority processing. This commit suppresses the warning messages to prevent scheduling problems while retaining the failure count in the statistics of the network interface. Signed-off-by: Doug Berger Acked-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/bcmsysport.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/net/ethernet/broadcom/bcmsysport.c +++ b/drivers/net/ethernet/broadcom/bcmsysport.c @@ -677,7 +677,8 @@ static struct sk_buff *bcm_sysport_rx_re dma_addr_t mapping; /* Allocate a new SKB for a new packet */ - skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH); + skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH, + GFP_ATOMIC | __GFP_NOWARN); if (!skb) { priv->mib.alloc_rx_buff_failed++; netif_err(priv, rx_err, ndev, "SKB alloc failed\n");