From patchwork Wed Sep 23 09:39:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 521638 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id E0FC51401DE for ; Wed, 23 Sep 2015 19:39:24 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752968AbbIWJjU (ORCPT ); Wed, 23 Sep 2015 05:39:20 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38489 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751921AbbIWJjT (ORCPT ); Wed, 23 Sep 2015 05:39:19 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id 248C1A2C31; Wed, 23 Sep 2015 09:39:19 +0000 (UTC) Received: from shalem.localdomain.com (vpn1-4-66.ams2.redhat.com [10.36.4.66]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t8N9dH0r007693; Wed, 23 Sep 2015 05:39:17 -0400 From: Hans de Goede To: "David S. Miller" Cc: Maxime Ripard , netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com, Hans de Goede Subject: [PATCH] net: sun4i-emac: Properly free resources on probe failure and remove Date: Wed, 23 Sep 2015 11:39:16 +0200 Message-Id: <1443001156-20333-1-git-send-email-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Fix sun4i-emac not releasing the following resources: -iomapped memory not released on probe-failure nor on remove -clock not getting disabled on probe-failure nor on remove -sram not being released on remove And while at it also add error checking to the clk_prepare_enable call done on probe. Signed-off-by: Hans de Goede Acked-by: Maxime Ripard --- drivers/net/ethernet/allwinner/sun4i-emac.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/allwinner/sun4i-emac.c b/drivers/net/ethernet/allwinner/sun4i-emac.c index 48ce83e..8d50314 100644 --- a/drivers/net/ethernet/allwinner/sun4i-emac.c +++ b/drivers/net/ethernet/allwinner/sun4i-emac.c @@ -847,21 +847,25 @@ static int emac_probe(struct platform_device *pdev) if (ndev->irq == -ENXIO) { netdev_err(ndev, "No irq resource\n"); ret = ndev->irq; - goto out; + goto out_iounmap; } db->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(db->clk)) { ret = PTR_ERR(db->clk); - goto out; + goto out_iounmap; } - clk_prepare_enable(db->clk); + ret = clk_prepare_enable(db->clk); + if (ret) { + dev_err(&pdev->dev, "Error couldn't enable clock (%d)\n", ret); + goto out_iounmap; + } ret = sunxi_sram_claim(&pdev->dev); if (ret) { dev_err(&pdev->dev, "Error couldn't map SRAM to device\n"); - goto out; + goto out_clk_disable_unprepare; } db->phy_node = of_parse_phandle(np, "phy", 0); @@ -910,6 +914,10 @@ static int emac_probe(struct platform_device *pdev) out_release_sram: sunxi_sram_release(&pdev->dev); +out_clk_disable_unprepare: + clk_disable_unprepare(db->clk); +out_iounmap: + iounmap(db->membase); out: dev_err(db->dev, "not found (%d).\n", ret); @@ -921,8 +929,12 @@ out: static int emac_remove(struct platform_device *pdev) { struct net_device *ndev = platform_get_drvdata(pdev); + struct emac_board_info *db = netdev_priv(ndev); unregister_netdev(ndev); + sunxi_sram_release(&pdev->dev); + clk_disable_unprepare(db->clk); + iounmap(db->membase); free_netdev(ndev); dev_dbg(&pdev->dev, "released and freed device\n");