From patchwork Mon Jun 11 16:53:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 10458465 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 66BDF60234 for ; Mon, 11 Jun 2018 16:54:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 57C232851D for ; Mon, 11 Jun 2018 16:54:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4BE6028522; Mon, 11 Jun 2018 16:54:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, FREEMAIL_FROM, MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2DBCD28520 for ; Mon, 11 Jun 2018 16:54:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=W35mIc3nhK+oqt4TCApeTuYo/1Vl6ervBVQ70PiUxFA=; b=B+q Lzm4hlM0k2UjusJxjDxNaFn37dxtMZZHJjc7uHlISpzqa+NQI6jhekrH68rrJUvctYGfGV2Ae9/pJ KTLIaESwgK3CbKuDW0locVZ8Cxr8iohpSAzj9hKRbq3Crp65PtCp0eoOKBU2KCT8tHCRDYCMjjrze Y95C4Miiv34DvgCIMDrMCxF0hA6rmv6kY2DWnlORkBStZRL6ZeyvWrdoEbmLkMMHllLQ9iS/Abosq 2v8B4zqCj6J8Ou9WzkogM8JSJkOEnpfBBEocoKXL7ofbc4tQkbCVQ+T9q2TOusKM8DVCzBO9bdeVA mLLKbj+aNdXhqq1esej0vJIrRoiil1g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fSQ50-0003s3-VF; Mon, 11 Jun 2018 16:54:06 +0000 Received: from smtp06.smtpout.orange.fr ([80.12.242.128] helo=smtp.smtpout.orange.fr) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fSQ4w-0003dZ-D9 for linux-arm-kernel@lists.infradead.org; Mon, 11 Jun 2018 16:54:04 +0000 Received: from localhost.localdomain ([77.136.205.128]) by mwinf5d63 with ME id xUtj1x0072mkQqM03UtjM5; Mon, 11 Jun 2018 18:53:47 +0200 X-ME-Helo: localhost.localdomain X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Mon, 11 Jun 2018 18:53:47 +0200 X-ME-IP: 77.136.205.128 From: Christophe JAILLET To: weiyongjun1@huawei.com, narmstrong@baylibre.com, airlied@linux.ie, carlo@caione.org, khilman@baylibre.com Subject: [PATCH] drm/meson: Fix an un-handled error path in 'meson_drv_bind_master()' Date: Mon, 11 Jun 2018 18:53:35 +0200 Message-Id: <20180611165335.24542-1-christophe.jaillet@wanadoo.fr> X-Mailer: git-send-email 2.17.0 X-Antivirus: Avast (VPS 180611-4, 11/06/2018), Outbound message X-Antivirus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180611_095402_740978_AC381647 X-CRM114-Status: GOOD ( 17.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Christophe JAILLET , linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP If 'platform_get_resource_byname()' fails, we should release some resources before leaving, as already done in the other error handling path of the function. Fixes: acaa3f13b8dd ("drm/meson: Fix potential NULL dereference in meson_drv_bind_master()") Signed-off-by: Christophe JAILLET Acked-by: Neil Armstrong --- drivers/gpu/drm/meson/meson_drv.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c index 32b1a6cdecfc..d3443125e661 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -197,8 +197,10 @@ static int meson_drv_bind_master(struct device *dev, bool has_components) priv->io_base = regs; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi"); - if (!res) - return -EINVAL; + if (!res) { + ret = -EINVAL; + goto free_drm; + } /* Simply ioremap since it may be a shared register zone */ regs = devm_ioremap(dev, res->start, resource_size(res)); if (!regs) { @@ -215,8 +217,10 @@ static int meson_drv_bind_master(struct device *dev, bool has_components) } res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc"); - if (!res) - return -EINVAL; + if (!res) { + ret = -EINVAL; + goto free_drm; + } /* Simply ioremap since it may be a shared register zone */ regs = devm_ioremap(dev, res->start, resource_size(res)); if (!regs) {