From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 0ADE5C38A2B for ; Sat, 11 Apr 2020 23:05:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D8B1C21D7D for ; Sat, 11 Apr 2020 23:05:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646343; bh=43dPpnebO2RnaPqUJ2m9OtgsPWit1vaBHjJNvfsHAZ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AD9mUFFLxbRTlRyrXYon54kdjmXzgBB3JPf5190QZ0+SRbjmPsH41nrrS86nqiFSC D2lXnawWQrTpQLaAhcwzclgGeH+4D3h+YcRy9mLq4AL1yPJCLpFCG+YCco1WIwEYL0 Hsm0m0+MJXWbSWpUa1qynXtY/+ZKN6TPIeRrz3/w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727044AbgDKXFl (ORCPT ); Sat, 11 Apr 2020 19:05:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:40014 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726991AbgDKXFj (ORCPT ); Sat, 11 Apr 2020 19:05:39 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 267AD20708; Sat, 11 Apr 2020 23:05:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646339; bh=43dPpnebO2RnaPqUJ2m9OtgsPWit1vaBHjJNvfsHAZ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aVE+NLKAdugdRLmq1dCKL2saVBL5IXM3plfdaMhaHeOhzCTC6M1b3dcf4kZUP8GnN 6FEMMMhIB5Up4G8PdI03ral6uL6SiW5mhU0fEcY0zRPVjQceW9lEiNTEVasRVNHIHc 4Rxgl7LnlwLkcbLrtn0iPKs9BWZc2w0gZGbug72w= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Laurent Pinchart , Hans Verkuil , Tomi Valkeinen , Sam Ravnborg , Sebastian Reichel , Sasha Levin , dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.6 089/149] drm/omap: dss: Cleanup DSS ports on initialisation failure Date: Sat, 11 Apr 2020 19:02:46 -0400 Message-Id: <20200411230347.22371-89-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200411230347.22371-1-sashal@kernel.org> References: <20200411230347.22371-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Laurent Pinchart [ Upstream commit 2a0a3ae17d36fa86dcf7c8e8d7b7f056ebd6c064 ] When the DSS initialises its output DPI and SDI ports, failures don't clean up previous successfully initialised ports. This can lead to resource leak or memory corruption. Fix it. Reported-by: Hans Verkuil Signed-off-by: Laurent Pinchart Reviewed-by: Tomi Valkeinen Acked-by: Sam Ravnborg Tested-by: Sebastian Reichel Reviewed-by: Sebastian Reichel Signed-off-by: Tomi Valkeinen Link: https://patchwork.freedesktop.org/patch/msgid/20200226112514.12455-22-laurent.pinchart@ideasonboard.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/omapdrm/dss/dss.c | 43 +++++++++++++++++++------------ 1 file changed, 26 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/omapdrm/dss/dss.c b/drivers/gpu/drm/omapdrm/dss/dss.c index 225ec808b01a9..67b92b5d8dd76 100644 --- a/drivers/gpu/drm/omapdrm/dss/dss.c +++ b/drivers/gpu/drm/omapdrm/dss/dss.c @@ -1151,46 +1151,38 @@ static const struct dss_features dra7xx_dss_feats = { .has_lcd_clk_src = true, }; -static int dss_init_ports(struct dss_device *dss) +static void __dss_uninit_ports(struct dss_device *dss, unsigned int num_ports) { struct platform_device *pdev = dss->pdev; struct device_node *parent = pdev->dev.of_node; struct device_node *port; unsigned int i; - int r; - for (i = 0; i < dss->feat->num_ports; i++) { + for (i = 0; i < num_ports; i++) { port = of_graph_get_port_by_id(parent, i); if (!port) continue; switch (dss->feat->ports[i]) { case OMAP_DISPLAY_TYPE_DPI: - r = dpi_init_port(dss, pdev, port, dss->feat->model); - if (r) - return r; + dpi_uninit_port(port); break; - case OMAP_DISPLAY_TYPE_SDI: - r = sdi_init_port(dss, pdev, port); - if (r) - return r; + sdi_uninit_port(port); break; - default: break; } } - - return 0; } -static void dss_uninit_ports(struct dss_device *dss) +static int dss_init_ports(struct dss_device *dss) { struct platform_device *pdev = dss->pdev; struct device_node *parent = pdev->dev.of_node; struct device_node *port; - int i; + unsigned int i; + int r; for (i = 0; i < dss->feat->num_ports; i++) { port = of_graph_get_port_by_id(parent, i); @@ -1199,15 +1191,32 @@ static void dss_uninit_ports(struct dss_device *dss) switch (dss->feat->ports[i]) { case OMAP_DISPLAY_TYPE_DPI: - dpi_uninit_port(port); + r = dpi_init_port(dss, pdev, port, dss->feat->model); + if (r) + goto error; break; + case OMAP_DISPLAY_TYPE_SDI: - sdi_uninit_port(port); + r = sdi_init_port(dss, pdev, port); + if (r) + goto error; break; + default: break; } } + + return 0; + +error: + __dss_uninit_ports(dss, i); + return r; +} + +static void dss_uninit_ports(struct dss_device *dss) +{ + __dss_uninit_ports(dss, dss->feat->num_ports); } static int dss_video_pll_probe(struct dss_device *dss) -- 2.20.1