From patchwork Mon Feb 17 23:35:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hauke Mehrtens X-Patchwork-Id: 1239686 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=hauke-m.de Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48M0jQ0XMkz9sNg for ; Tue, 18 Feb 2020 10:35:54 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726097AbgBQXfx (ORCPT ); Mon, 17 Feb 2020 18:35:53 -0500 Received: from mout-p-202.mailbox.org ([80.241.56.172]:30528 "EHLO mout-p-202.mailbox.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726047AbgBQXfw (ORCPT ); Mon, 17 Feb 2020 18:35:52 -0500 Received: from smtp2.mailbox.org (smtp2.mailbox.org [IPv6:2001:67c:2050:105:465:1:2:0]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (No client certificate requested) by mout-p-202.mailbox.org (Postfix) with ESMTPS id 48M0jL5crqzQkK0; Tue, 18 Feb 2020 00:35:50 +0100 (CET) X-Virus-Scanned: amavisd-new at heinlein-support.de Received: from smtp2.mailbox.org ([80.241.60.241]) by spamfilter05.heinlein-hosting.de (spamfilter05.heinlein-hosting.de [80.241.56.123]) (amavisd-new, port 10030) with ESMTP id 646KXWI6X3yA; Tue, 18 Feb 2020 00:35:47 +0100 (CET) From: Hauke Mehrtens To: davem@davemloft.net, linux@rempel-privat.de Cc: netdev@vger.kernel.org, jcliburn@gmail.com, chris.snook@gmail.com, Hauke Mehrtens Subject: [PATCH 1/3] ag71xx: Handle allocation errors in ag71xx_rings_init() Date: Tue, 18 Feb 2020 00:35:16 +0100 Message-Id: <20200217233518.3159-1-hauke@hauke-m.de> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Free the allocated resources in ag71xx_rings_init() in case ag71xx_ring_rx_init() returns an error. This is only a potential problem, I did not ran into this one. Signed-off-by: Hauke Mehrtens Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver") --- drivers/net/ethernet/atheros/ag71xx.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c index e95687a780fb..6f7281f38d5a 100644 --- a/drivers/net/ethernet/atheros/ag71xx.c +++ b/drivers/net/ethernet/atheros/ag71xx.c @@ -1133,6 +1133,7 @@ static int ag71xx_rings_init(struct ag71xx *ag) struct ag71xx_ring *tx = &ag->tx_ring; struct ag71xx_ring *rx = &ag->rx_ring; int ring_size, tx_size; + int ret; ring_size = BIT(tx->order) + BIT(rx->order); tx_size = BIT(tx->order); @@ -1145,9 +1146,8 @@ static int ag71xx_rings_init(struct ag71xx *ag) ring_size * AG71XX_DESC_SIZE, &tx->descs_dma, GFP_KERNEL); if (!tx->descs_cpu) { - kfree(tx->buf); - tx->buf = NULL; - return -ENOMEM; + ret = -ENOMEM; + goto err_free_buf; } rx->buf = &tx->buf[tx_size]; @@ -1155,7 +1155,21 @@ static int ag71xx_rings_init(struct ag71xx *ag) rx->descs_dma = tx->descs_dma + tx_size * AG71XX_DESC_SIZE; ag71xx_ring_tx_init(ag); - return ag71xx_ring_rx_init(ag); + ret = ag71xx_ring_rx_init(ag); + if (ret) + goto err_free_dma; + + return 0; + +err_free_dma: + dma_free_coherent(&ag->pdev->dev, ring_size * AG71XX_DESC_SIZE, + tx->descs_cpu, tx->descs_dma); + rx->buf = NULL; +err_free_buf: + kfree(tx->buf); + tx->buf = NULL; + + return ret; } static void ag71xx_rings_free(struct ag71xx *ag)