From patchwork Thu Aug 6 00:23:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 6955151 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 3C9049F358 for ; Thu, 6 Aug 2015 00:22:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4CA8E20638 for ; Thu, 6 Aug 2015 00:22:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4D72C20631 for ; Thu, 6 Aug 2015 00:22:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753093AbbHFAWQ (ORCPT ); Wed, 5 Aug 2015 20:22:16 -0400 Received: from galahad.ideasonboard.com ([185.26.127.97]:36260 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751679AbbHFAWQ (ORCPT ); Wed, 5 Aug 2015 20:22:16 -0400 Received: from avalon.pp.htv.fi (85-23-193-79.bb.dnainternet.fi [85.23.193.79]) by galahad.ideasonboard.com (Postfix) with ESMTPSA id 3FF8B20115; Thu, 6 Aug 2015 02:21:05 +0200 (CEST) From: Laurent Pinchart To: dri-devel@lists.freedesktop.org Cc: linux-sh@vger.kernel.org Subject: [PATCH] drm: rcar-du: Fix plane state free in plane reset handler Date: Thu, 6 Aug 2015 03:23:00 +0300 Message-Id: <1438820580-14301-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.4.6 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The plane reset handler frees the plane state and allocates a new default state, but when doing so attempt to free the plane state using the base plane state pointer instead of casting it to the driver-specific state object that has been allocated. Fix it by using the rcar_du_plane_atomic_destroy_state() function to destroy the plane state instead of duplicating the code. Signed-off-by: Laurent Pinchart Reviewed-by: Thierry Reding --- drivers/gpu/drm/rcar-du/rcar_du_plane.c | 45 ++++++++++++++++----------------- 1 file changed, 22 insertions(+), 23 deletions(-) Should the DRM core free the atomic state before calling the reset operation ? That would simplify drivers. diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index c66986414bb4..ffa583712cd9 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c @@ -273,29 +273,6 @@ static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = { .atomic_update = rcar_du_plane_atomic_update, }; -static void rcar_du_plane_reset(struct drm_plane *plane) -{ - struct rcar_du_plane_state *state; - - if (plane->state && plane->state->fb) - drm_framebuffer_unreference(plane->state->fb); - - kfree(plane->state); - plane->state = NULL; - - state = kzalloc(sizeof(*state), GFP_KERNEL); - if (state == NULL) - return; - - state->hwindex = -1; - state->alpha = 255; - state->colorkey = RCAR_DU_COLORKEY_NONE; - state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1; - - plane->state = &state->state; - plane->state->plane = plane; -} - static struct drm_plane_state * rcar_du_plane_atomic_duplicate_state(struct drm_plane *plane) { @@ -322,6 +299,28 @@ static void rcar_du_plane_atomic_destroy_state(struct drm_plane *plane, kfree(to_rcar_plane_state(state)); } +static void rcar_du_plane_reset(struct drm_plane *plane) +{ + struct rcar_du_plane_state *state; + + if (plane->state) { + rcar_du_plane_atomic_destroy_state(plane, plane->state); + plane->state = NULL; + } + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (state == NULL) + return; + + state->hwindex = -1; + state->alpha = 255; + state->colorkey = RCAR_DU_COLORKEY_NONE; + state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1; + + plane->state = &state->state; + plane->state->plane = plane; +} + static int rcar_du_plane_atomic_set_property(struct drm_plane *plane, struct drm_plane_state *state, struct drm_property *property,