From patchwork Fri Jun 16 18:10:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9793145 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 863C860231 for ; Fri, 16 Jun 2017 18:27:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 80EE82866B for ; Fri, 16 Jun 2017 18:27:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7575A2866E; Fri, 16 Jun 2017 18:27:43 +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 30D772866B for ; Fri, 16 Jun 2017 18:27:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752696AbdFPSLf (ORCPT ); Fri, 16 Jun 2017 14:11:35 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:60482 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751711AbdFPSLb (ORCPT ); Fri, 16 Jun 2017 14:11:31 -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=THVPuyuHTKM8ALqXwsIZqKBJZ SK3+dGgdzbAXPQeRkU6eFYuLB2ODWl9twiGUVkGVau4AyN1LdNLSJVhfMKYIyFA3r9yBqyAknCEO6 n9YFfIM2GQJXnm/5VpIyRJXXOoYKhpLPv1PJfdLZU7lI0b9XYaxxmIl/Sc5tqTVfINjx5r/vBPwLE hf2G4UP+ZPYIndT+Ad+Xw42tQl724CLBzEcyMVg4dpuEIVmDadecp7yA4G1m+zUIGe1Q6HJi0RSMe 9kpTabDT4+AJiaJcXcIfn8/s8oMbjIo88GmY42gJLQF2mpA9Im6RwC84Naq1m8py5sIwUU0cdZKH3 5ORGslnRQ==; 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 1dLviM-0004MA-4P; Fri, 16 Jun 2017 18:11:22 +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: Fri, 16 Jun 2017 20:10:19 +0200 Message-Id: <20170616181059.19206-5-hch@lst.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170616181059.19206-1-hch@lst.de> References: <20170616181059.19206-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@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]; }