From patchwork Fri May 8 12:35:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 226160 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, 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 42C91C38A2A for ; Fri, 8 May 2020 13:03:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23FBC2054F for ; Fri, 8 May 2020 13:03:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588942996; bh=0mSkGy0oC3RiEQxtQffXpbxMNK+NEg71P7bFUCmUyDw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yBIACLZwT6NatABcfM36elWak0GiqzFd7GvPnUseL+hhJnfeiZXesGUa+fPr5ErmY i2hdE9lPkjTLRPLbr7pdv+dINlvOjbl2djKDR0CbTaw4GehoM9KBSkrweBpiJ15izN bcBUHUFDg6JkeN3FsJjt/ZnQqMmcTVmpWDtt8n9c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729753AbgEHNDB (ORCPT ); Fri, 8 May 2020 09:03:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:58250 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727852AbgEHMu1 (ORCPT ); Fri, 8 May 2020 08:50:27 -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 0F833218AC; Fri, 8 May 2020 12:50:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588942225; bh=0mSkGy0oC3RiEQxtQffXpbxMNK+NEg71P7bFUCmUyDw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LUyazTB4hSi+eLdfCtnNJLwmT4+7BTmReQlo8y/dVykeIQzx4QqdVl7uQWGU1l946 Iljd2+UbZkKmqhPURwHii+aJ9Q8rY+bTJJ66m+QZNj+8mJOKTXZxgsbey3KPHaPtw2 PfBFsetnQj8vBDrxHh+rdiDF5CIRHRaGN/p98pUw= 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 4.14 16/22] net: bcmgenet: suppress warnings on failed Rx SKB allocations Date: Fri, 8 May 2020 14:35:28 +0200 Message-Id: <20200508123035.908374446@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200508123033.915895060@linuxfoundation.org> References: <20200508123033.915895060@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Doug Berger [ Upstream commit ecaeceb8a8a145d93c7e136f170238229165348f ] 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/genet/bcmgenet.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index 4b3660c63b864..38391230ca860 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -1674,7 +1674,8 @@ static struct sk_buff *bcmgenet_rx_refill(struct bcmgenet_priv *priv, dma_addr_t mapping; /* Allocate a new Rx skb */ - skb = netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT); + skb = __netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT, + GFP_ATOMIC | __GFP_NOWARN); if (!skb) { priv->mib.alloc_rx_buff_failed++; netif_err(priv, rx_err, priv->dev,