From patchwork Mon Jan 24 18:36:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 536103 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 240B6C35268 for ; Mon, 24 Jan 2022 19:48:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346576AbiAXTsX (ORCPT ); Mon, 24 Jan 2022 14:48:23 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:40436 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355625AbiAXTnC (ORCPT ); Mon, 24 Jan 2022 14:43:02 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D6A606135E; Mon, 24 Jan 2022 19:42:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0F33C340E5; Mon, 24 Jan 2022 19:42:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643053376; bh=H/tPH33St1gFh5Gacd8JGf5OOGlFWqNnI4EL4xPm4mc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i+cX1YA652ZuRjNUDOAn1mDfKvWGzIqcS93vKaSISLVzl7fDwylVbstk0ycp8MtI/ EOlvuaAkJUiNlmB8KuJ4bKNXQk5SWc6qVdDXC/sNBlt75f0QohsZjMdND7OSTN/b/+ NzTYSFCR7Ar4xuYAqdZN98bTVBE7S+rFnbwt2jrE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Brian Norris , Sam Ravnborg , Sasha Levin Subject: [PATCH 5.10 045/563] drm/panel: kingdisplay-kd097d04: Delete panel on attach() failure Date: Mon, 24 Jan 2022 19:36:50 +0100 Message-Id: <20220124184025.969267910@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184024.407936072@linuxfoundation.org> References: <20220124184024.407936072@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Brian Norris [ Upstream commit 5f31dbeae8a88f31c3eb4eb526ab4807c40da241 ] If we fail to attach (e.g., because 1 of 2 dual-DSI controllers aren't ready), we leave a dangling drm_panel reference to freed memory. Clean that up on failure. Fixes: 2a994cbed6b2 ("drm/panel: Add Kingdisplay KD097D04 panel driver") Signed-off-by: Brian Norris Signed-off-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210923173336.1.Icb4d9dbc1817f4e826361a4f1cea7461541668f0@changeid Signed-off-by: Sasha Levin --- drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c index 86e4213e8bb13..daccb1fd5fdad 100644 --- a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c +++ b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c @@ -406,7 +406,13 @@ static int kingdisplay_panel_probe(struct mipi_dsi_device *dsi) if (err < 0) return err; - return mipi_dsi_attach(dsi); + err = mipi_dsi_attach(dsi); + if (err < 0) { + kingdisplay_panel_del(kingdisplay); + return err; + } + + return 0; } static int kingdisplay_panel_remove(struct mipi_dsi_device *dsi)