From patchwork Sat May 8 03:55:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen (ThunderTown)" X-Patchwork-Id: 12245809 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 B7364C433B4 for ; Sat, 8 May 2021 03:56:22 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6BA02611CC for ; Sat, 8 May 2021 03:56:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6BA02611CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B5F466E850; Sat, 8 May 2021 03:56:21 +0000 (UTC) Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) by gabe.freedesktop.org (Postfix) with ESMTPS id 246B06E852 for ; Sat, 8 May 2021 03:56:20 +0000 (UTC) Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FcYMT1TF9z16Pc9; Sat, 8 May 2021 11:53:41 +0800 (CST) Received: from thunder-town.china.huawei.com (10.174.177.72) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.498.0; Sat, 8 May 2021 11:56:10 +0800 From: Zhen Lei To: David Airlie , Daniel Vetter , dri-devel , linux-kernel Subject: [PATCH 1/1] drm/mga: Fix error return code in mga_do_pci_dma_bootstrap() Date: Sat, 8 May 2021 11:55:54 +0800 Message-ID: <20210508035554.2424-1-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.174.177.72] X-CFilter-Loop: Reflected X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zhen Lei Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The user may incorrectly set the value of dma_bs->secondary_bin_count to 0. In this case, the for loop is not entered and the 'err' value remains 0. Fixes: 6795c985a648 ("Add support for PCI MGA cards to MGA DRM.") Reported-by: Hulk Robot Signed-off-by: Zhen Lei --- drivers/gpu/drm/mga/mga_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mga/mga_dma.c b/drivers/gpu/drm/mga/mga_dma.c index 1cb7d120d18f..e41d44ec26de 100644 --- a/drivers/gpu/drm/mga/mga_dma.c +++ b/drivers/gpu/drm/mga/mga_dma.c @@ -693,7 +693,7 @@ static int mga_do_pci_dma_bootstrap(struct drm_device *dev, } if (bin_count == 0) { - DRM_ERROR("Unable to add secondary DMA buffers: %d\n", err); + DRM_ERROR("Unable to add secondary DMA buffers: %d\n", err ? : -EINVAL); return err; }