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=-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=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 9EE0BC2D0DB for ; Tue, 28 Jan 2020 14:35:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6649A206A2 for ; Tue, 28 Jan 2020 14:35:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580222148; bh=bE8o3OQvcMXCoNjxx7+jugWh8bZK+iZueB5gdaJ+QW0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=E7Saz8Cy/IryfPkPBgRpH9haQ74lZk7Axx1j12hjg+liwxJdlaFOqE2/L77HZj49m QwqXFB09DjulEzr7ROjWp4XJ0Y6X6/bP6u2i38eQEi8xGPq9w7uFGvftqBbMXN3WsP g2i5ibhPbu2rGdT89zikQZBLf+y+njW8oGaNkZwc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732869AbgA1Ofr (ORCPT ); Tue, 28 Jan 2020 09:35:47 -0500 Received: from mail.kernel.org ([198.145.29.99]:48704 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731717AbgA1OWt (ORCPT ); Tue, 28 Jan 2020 09:22:49 -0500 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 C07E224686; Tue, 28 Jan 2020 14:22:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580221368; bh=bE8o3OQvcMXCoNjxx7+jugWh8bZK+iZueB5gdaJ+QW0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PoH5ghDU1eBk7HdoHuj+UffNzKdr/UyvucndUHC8IufF+c6TXZBsmxvv7MMLriusr 5BtY8oWEBNlO4fEX+X22/NGB0a1o0P8S9Lfy7v0HINl5RKOjOLVHdECMBzlfJtobg/ 5v908SY/gO3jO1odkFfga1cr2dIZBWRrz5yw0MLQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mao Wenan , "David S. Miller" , Sasha Levin Subject: [PATCH 4.9 197/271] net: sonic: return NETDEV_TX_OK if failed to map buffer Date: Tue, 28 Jan 2020 15:05:46 +0100 Message-Id: <20200128135907.245244896@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200128135852.449088278@linuxfoundation.org> References: <20200128135852.449088278@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mao Wenan [ Upstream commit 6e1cdedcf0362fed3aedfe051d46bd7ee2a85fe1 ] NETDEV_TX_BUSY really should only be used by drivers that call netif_tx_stop_queue() at the wrong moment. If dma_map_single() is failed to map tx DMA buffer, it might trigger an infinite loop. This patch use NETDEV_TX_OK instead of NETDEV_TX_BUSY, and change printk to pr_err_ratelimited. Fixes: d9fb9f384292 ("*sonic/natsemi/ns83829: Move the National Semi-conductor drivers") Signed-off-by: Mao Wenan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/natsemi/sonic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/natsemi/sonic.c b/drivers/net/ethernet/natsemi/sonic.c index 23821540ab078..11f472fd5d477 100644 --- a/drivers/net/ethernet/natsemi/sonic.c +++ b/drivers/net/ethernet/natsemi/sonic.c @@ -221,9 +221,9 @@ static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev) laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE); if (!laddr) { - printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name); + pr_err_ratelimited("%s: failed to map tx DMA buffer.\n", dev->name); dev_kfree_skb(skb); - return NETDEV_TX_BUSY; + return NETDEV_TX_OK; } sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */ -- 2.20.1