From patchwork Tue Dec 15 11:20:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Boris BREZILLON X-Patchwork-Id: 7853511 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CD1A6BEEE1 for ; Tue, 15 Dec 2015 11:21:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F138920389 for ; Tue, 15 Dec 2015 11:21:24 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 9D5642038F for ; Tue, 15 Dec 2015 11:21:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 255436E6BB; Tue, 15 Dec 2015 03:21:21 -0800 (PST) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail.free-electrons.com (down.free-electrons.com [37.187.137.238]) by gabe.freedesktop.org (Postfix) with ESMTP id F2C466E6BA for ; Tue, 15 Dec 2015 03:21:19 -0800 (PST) Received: by mail.free-electrons.com (Postfix, from userid 110) id 40F10441; Tue, 15 Dec 2015 12:21:18 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost.localdomain (AToulouse-657-1-9-66.w83-193.abo.wanadoo.fr [83.193.70.66]) by mail.free-electrons.com (Postfix) with ESMTPSA id 0145843E; Tue, 15 Dec 2015 12:21:17 +0100 (CET) From: Boris Brezillon To: Daniel Vetter , David Airlie , dri-devel@lists.freedesktop.org Subject: [RESEND PATCH 01/28] drm/gma500: Sanity-check pipe index Date: Tue, 15 Dec 2015 12:20:49 +0100 Message-Id: <1450178476-26284-2-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1450178476-26284-1-git-send-email-boris.brezillon@free-electrons.com> References: <1450178476-26284-1-git-send-email-boris.brezillon@free-electrons.com> MIME-Version: 1.0 Cc: Thierry Reding X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Thierry Reding If the DSI output isn't connected, then mdfld_dsi_encoder_get_pipe() will return -1. The mdfld_dsi_dp_mode_set() function doesn't properly check for this condition and causes the following compiler warnings: CC drivers/gpu/drm/gma500/mdfld_dsi_dpi.o drivers/gpu/drm/gma500/mdfld_dsi_dpi.c: In function ‘mdfld_dsi_dpi_mode_set’: drivers/gpu/drm/gma500/mdfld_dsi_dpi.c:828:35: warning: array subscript is below array bounds [-Warray-bounds] u32 pipeconf = dev_priv->pipeconf[pipe]; ^ drivers/gpu/drm/gma500/mdfld_dsi_dpi.c:829:33: warning: array subscript is below array bounds [-Warray-bounds] u32 dspcntr = dev_priv->dspcntr[pipe]; ^ Fix this by checking for a valid pipe before indexing the pipeconf and dspcntr arrays. Cc: Patrik Jakobsson Reviewed-by: Patrik Jakobsson Signed-off-by: Thierry Reding --- drivers/gpu/drm/gma500/mdfld_dsi_dpi.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_dpi.c b/drivers/gpu/drm/gma500/mdfld_dsi_dpi.c index 1a1acd3..7cd87a0 100644 --- a/drivers/gpu/drm/gma500/mdfld_dsi_dpi.c +++ b/drivers/gpu/drm/gma500/mdfld_dsi_dpi.c @@ -821,14 +821,18 @@ void mdfld_dsi_dpi_mode_set(struct drm_encoder *encoder, struct drm_device *dev = dsi_config->dev; struct drm_psb_private *dev_priv = dev->dev_private; int pipe = mdfld_dsi_encoder_get_pipe(dsi_encoder); - u32 pipeconf_reg = PIPEACONF; u32 dspcntr_reg = DSPACNTR; + u32 pipeconf, dspcntr; - u32 pipeconf = dev_priv->pipeconf[pipe]; - u32 dspcntr = dev_priv->dspcntr[pipe]; u32 mipi = MIPI_PORT_EN | PASS_FROM_SPHY_TO_AFE | SEL_FLOPPED_HSTX; + if (WARN_ON(pipe < 0)) + return; + + pipeconf = dev_priv->pipeconf[pipe]; + dspcntr = dev_priv->dspcntr[pipe]; + if (pipe) { pipeconf_reg = PIPECCONF; dspcntr_reg = DSPCCNTR;