From patchwork Thu Aug 25 14:37:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 600604 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 C79C6C64991 for ; Thu, 25 Aug 2022 14:39:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242231AbiHYOjb (ORCPT ); Thu, 25 Aug 2022 10:39:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241661AbiHYOjC (ORCPT ); Thu, 25 Aug 2022 10:39:02 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE31BADCF1 for ; Thu, 25 Aug 2022 07:38:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1661438288; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Gy4nad6Qh8tnv7TIvT0rDPmcwKdzWmM3aE/TJMfZBr0=; b=M9jDaOCt2C92ofkK3PWerAHg91BIFFcVk2qBQLh32tZh6fQCs9OZcQwJdgRvkzbGo/YyOC fbqimREBTaVlXky8AZDTwniACWfEKgbJlbweHIqel+5jDDMq7V6SlAScNliXBT6uJkIEG8 TSm1t2syGXRcs2gFOxdvRw97d4GabHA= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-513-wZcURxNvMzqeMpLwY3YdPg-1; Thu, 25 Aug 2022 10:38:04 -0400 X-MC-Unique: wZcURxNvMzqeMpLwY3YdPg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 6A62181F46A; Thu, 25 Aug 2022 14:38:03 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.193.46]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9E1442166B26; Thu, 25 Aug 2022 14:37:59 +0000 (UTC) From: Hans de Goede To: Ben Skeggs , Karol Herbst , Lyude , Daniel Dadap , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , Pan@vger.kernel.org, Xinhui , "Rafael J . Wysocki" , Mika Westerberg , Lukas Wunner , Mark Gross , Andy Shevchenko Cc: Hans de Goede , nouveau@lists.freedesktop.org, Daniel Vetter , David Airlie , intel-gfx , dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, Len Brown , linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org, "Rafael J . Wysocki" Subject: [PATCH v5 08/31] ACPI: video: Simplify acpi_video_unregister_backlight() Date: Thu, 25 Aug 2022 16:37:03 +0200 Message-Id: <20220825143726.269890-9-hdegoede@redhat.com> In-Reply-To: <20220825143726.269890-1-hdegoede@redhat.com> References: <20220825143726.269890-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org When acpi_video_register() has not run yet the video_bus_head will be empty, so there is no need to check the register_count flag first. Acked-by: Rafael J. Wysocki Signed-off-by: Hans de Goede --- drivers/acpi/acpi_video.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c index cde8ffa9f0b8..8545bf94866f 100644 --- a/drivers/acpi/acpi_video.c +++ b/drivers/acpi/acpi_video.c @@ -2257,14 +2257,10 @@ void acpi_video_unregister_backlight(void) { struct acpi_video_bus *video; - mutex_lock(®ister_count_mutex); - if (register_count) { - mutex_lock(&video_list_lock); - list_for_each_entry(video, &video_bus_head, entry) - acpi_video_bus_unregister_backlight(video); - mutex_unlock(&video_list_lock); - } - mutex_unlock(®ister_count_mutex); + mutex_lock(&video_list_lock); + list_for_each_entry(video, &video_bus_head, entry) + acpi_video_bus_unregister_backlight(video); + mutex_unlock(&video_list_lock); } bool acpi_video_handles_brightness_key_presses(void)