From patchwork Thu Jun 8 13:25:29 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9774707 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 9810560393 for ; Thu, 8 Jun 2017 13:26:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8A194284ED for ; Thu, 8 Jun 2017 13:26:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7E9882850E; Thu, 8 Jun 2017 13:26:41 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0FC7F284ED for ; Thu, 8 Jun 2017 13:26:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751640AbdFHN0i (ORCPT ); Thu, 8 Jun 2017 09:26:38 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:52940 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751624AbdFHN0f (ORCPT ); Thu, 8 Jun 2017 09:26:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=VolBZDxS9ZQrQoHzmubjiZ2v8Rk+FgSixd/DX4o9p2E=; b=gF+6aDODIb7xcHBd7xdo+sHop 1Bh4UuYpu1Mt5Zc9LJ8djA0u+qYbfjcRYBu4PgpcovWdfLQm5pSH+ik9urNqGCEWSDi90KUEDViK7 z8/HkDLChErmKMHxPDVsohs4XTYF4id0ezPjvvBExGPcnSTPr8igshrAvzNnY3GMfw05ZJWzzUN0N Z8oB7GyXuCvPufd6GNByT/f7+3sAkQ8KBbP8qdBQkNUFtl+HR7pKHBvOxNjOo+8lqAL48nU/8boOd LEp/A5jpWQxpGvfUxQ8l5+0KIH+cOuxOrwzQUCVTFf4DT0FgelbP3BwTQYP+o+NYV2T+uQupQN8qz 8lchzhB5A==; Received: from clnet-p099-196.ikbnet.co.at ([83.175.99.196] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.87 #1 (Red Hat Linux)) id 1dIxSJ-00052V-9j; Thu, 08 Jun 2017 13:26:32 +0000 From: Christoph Hellwig To: x86@kernel.org, linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@linux-mips.org, openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, iommu@lists.linux-foundation.org, netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 04/44] drm/exynos: don't use DMA_ERROR_CODE Date: Thu, 8 Jun 2017 15:25:29 +0200 Message-Id: <20170608132609.32662-5-hch@lst.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170608132609.32662-1-hch@lst.de> References: <20170608132609.32662-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP DMA_ERROR_CODE already isn't a valid API to user for drivers and will go away soon. exynos_drm_fb_dma_addr uses it a an error return when the passed in index is invalid, but the callers never check for it but instead pass the address straight to the hardware. Add a WARN_ON instead and just return 0. Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/exynos/exynos_drm_fb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c index c77a5aced81a..d48fd7c918f8 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fb.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c @@ -181,8 +181,8 @@ dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index) { struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); - if (index >= MAX_FB_BUFFER) - return DMA_ERROR_CODE; + if (WARN_ON_ONCE(index >= MAX_FB_BUFFER)) + return 0; return exynos_fb->dma_addr[index]; }