From patchwork Thu Aug 30 21:00:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 964198 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=rere.qmqm.pl Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=rere.qmqm.pl header.i=@rere.qmqm.pl header.b="goMD5kfu"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 421Zm25B0Xz9s1c for ; Fri, 31 Aug 2018 07:06:10 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727504AbeHaBKH (ORCPT ); Thu, 30 Aug 2018 21:10:07 -0400 Received: from rere.qmqm.pl ([91.227.64.183]:33173 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727529AbeHaBKH (ORCPT ); Thu, 30 Aug 2018 21:10:07 -0400 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 421ZcJ25lTzLG; Thu, 30 Aug 2018 22:59:28 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1535662768; bh=23C/qzqkj8RjChvPXX8rs991ajnnysY2BBYNx0j+xsM=; h=Date:In-Reply-To:References:From:Subject:To:Cc:Cc:Cc:Cc:Cc:Cc:Cc: Cc:Cc:Cc:Cc:From; b=goMD5kfurOvo14jT2lxTRTSploLIJiT6vsifeig1YtT1dZ6T/WqzEiUTrCZ13bHNn hRtGDHJP2giMDkGurHmGNiNppvc02evXCHXSDvo0NjrK2jkxwVsr8QZEsbb5bk+sLc 7eLwk1wFEpgH4nA4KHSb8DFs4cic6P6+oB87tRZtTVH97IPz0YY9AfJTCbPD6/U0vD 1KP66ChmgcykcVkh239ZlnCjjp5z1kX7CZcVqBlVDisXBtvfh8MDplmazGcFWhxx/p 2A2lHtQFGRfPycCPuM1OlDY6qIPXrzVbvCR/5yGD3b+ollO3HgVoKvom1mD1KzD+q9 d8vs27od/YAQQ== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.100.0 at mail Date: Thu, 30 Aug 2018 23:00:05 +0200 Message-Id: <7e3a48e397298b38d7ddc7f45d48226d1f5db3e4.1535656077.git.mirq-linux@rere.qmqm.pl> In-Reply-To: References: From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH v2 02/12] fbdev: allow apertures == NULL in remove_conflicting_framebuffers() MIME-Version: 1.0 To: dri-devel@lists.freedesktop.org Cc: Bartlomiej Zolnierkiewicz , linux-fbdev@vger.kernel.org Cc: Alex Deucher Cc: Cc: David Airlie Cc: Eric Anholt Cc: Gerd Hoffmann Cc: Cc: Cc: Maxime Ripard Cc: Thierry Reding Cc: Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Interpret (otherwise-invalid) NULL apertures argument to mean all-memory range. This will allow to remove several duplicates of this code from drivers in following patches. Signed-off-by: Michał Mirosław [for v1] Acked-by: Bartlomiej Zolnierkiewicz --- v2: added kerneldoc to corresponding DRM helper --- drivers/video/fbdev/core/fbmem.c | 14 ++++++++++++++ include/drm/drm_fb_helper.h | 10 ++++++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 30a18d4c9de4..0df148eb4699 100644 --- a/drivers/video/fbdev/core/fbmem.c +++ b/drivers/video/fbdev/core/fbmem.c @@ -1779,11 +1779,25 @@ int remove_conflicting_framebuffers(struct apertures_struct *a, const char *name, bool primary) { int ret; + bool do_free = false; + + if (!a) { + a = alloc_apertures(1); + if (!a) + return -ENOMEM; + + a->ranges[0].base = 0; + a->ranges[0].size = ~0; + do_free = true; + } mutex_lock(®istration_lock); ret = do_remove_conflicting_framebuffers(a, name, primary); mutex_unlock(®istration_lock); + if (do_free) + kfree(a); + return ret; } EXPORT_SYMBOL(remove_conflicting_framebuffers); diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index b069433e7fc1..1c1e53abb25d 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -566,6 +566,16 @@ static inline void drm_fb_helper_output_poll_changed(struct drm_device *dev) #endif +/** + * drm_fb_helper_remove_conflicting_framebuffers - remove firmware framebuffers + * @a: memory range, users of which are to be removed + * @name: requesting driver name + * @primary: also kick vga16fb if present + * + * This function removes framebuffer devices (eg. initialized by firmware) + * which use memory range described by @a. If @a is NULL all such devices are + * removed. + */ static inline int drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a, const char *name, bool primary)