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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 66DB1C3A5A9 for ; Wed, 4 Sep 2019 18:21:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 40EDA20882 for ; Wed, 4 Sep 2019 18:21:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567621305; bh=/7KlZoP8hNzFiMv4BzL0iY/0QUqS+oK8r4POagI9Ndo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=towdR6RNwvtx/dgrKgW8QuRLuUZXGcREqNORPWtgtQEx4v/vzA2Tj8lOQFDCrWEkO BVeBcW2BLkEhB3UEaxUeO3noLOe7kCZVAucgQSTA+VWrbmdVBOvxSug5lJdDxiDbwc dfwjIcZINdI8z4gIdAD7OAOP2e7oCweP/ce8Qc+M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389042AbfIDSGI (ORCPT ); Wed, 4 Sep 2019 14:06:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:47968 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389007AbfIDSGH (ORCPT ); Wed, 4 Sep 2019 14:06:07 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1B243206B8; Wed, 4 Sep 2019 18:06:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567620366; bh=/7KlZoP8hNzFiMv4BzL0iY/0QUqS+oK8r4POagI9Ndo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aDDQxr/tAD5tV+lK4212m5SOtVpGnxdK9Z6ZByyC1624sVy6UjS+kY6PO/8DlEi01 T7v7z9+gn1Jbjx3pEq2d4TIihmXa8w3mAZc4Wwa2hjsQMVPZQt2jmejbGQZ956ORdM p3SuvcVP3MEE894HnMOyu/k2YZpq/8YsBdhszTls= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peter Ujfalusi , Jyri Sarha , Sasha Levin Subject: [PATCH 4.19 30/93] drm/tilcdc: Register cpufreq notifier after we have initialized crtc Date: Wed, 4 Sep 2019 19:53:32 +0200 Message-Id: <20190904175305.912604297@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190904175302.845828956@linuxfoundation.org> References: <20190904175302.845828956@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 432973fd3a20102840d5f7e61af9f1a03c217a4c ] Register cpufreq notifier after we have initialized the crtc and unregister it before we remove the ctrc. Receiving a cpufreq notify without crtc causes a crash. Reported-by: Peter Ujfalusi Signed-off-by: Jyri Sarha Signed-off-by: Sasha Levin --- drivers/gpu/drm/tilcdc/tilcdc_drv.c | 34 ++++++++++++++--------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index 0fb300d41a09c..e1868776da252 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -184,6 +184,12 @@ static void tilcdc_fini(struct drm_device *dev) { struct tilcdc_drm_private *priv = dev->dev_private; +#ifdef CONFIG_CPU_FREQ + if (priv->freq_transition.notifier_call) + cpufreq_unregister_notifier(&priv->freq_transition, + CPUFREQ_TRANSITION_NOTIFIER); +#endif + if (priv->crtc) tilcdc_crtc_shutdown(priv->crtc); @@ -198,12 +204,6 @@ static void tilcdc_fini(struct drm_device *dev) drm_mode_config_cleanup(dev); tilcdc_remove_external_device(dev); -#ifdef CONFIG_CPU_FREQ - if (priv->freq_transition.notifier_call) - cpufreq_unregister_notifier(&priv->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); -#endif - if (priv->clk) clk_put(priv->clk); @@ -274,17 +274,6 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev) goto init_failed; } -#ifdef CONFIG_CPU_FREQ - priv->freq_transition.notifier_call = cpufreq_transition; - ret = cpufreq_register_notifier(&priv->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); - if (ret) { - dev_err(dev, "failed to register cpufreq notifier\n"); - priv->freq_transition.notifier_call = NULL; - goto init_failed; - } -#endif - if (of_property_read_u32(node, "max-bandwidth", &priv->max_bandwidth)) priv->max_bandwidth = TILCDC_DEFAULT_MAX_BANDWIDTH; @@ -361,6 +350,17 @@ static int tilcdc_init(struct drm_driver *ddrv, struct device *dev) } modeset_init(ddev); +#ifdef CONFIG_CPU_FREQ + priv->freq_transition.notifier_call = cpufreq_transition; + ret = cpufreq_register_notifier(&priv->freq_transition, + CPUFREQ_TRANSITION_NOTIFIER); + if (ret) { + dev_err(dev, "failed to register cpufreq notifier\n"); + priv->freq_transition.notifier_call = NULL; + goto init_failed; + } +#endif + if (priv->is_componentized) { ret = component_bind_all(dev, ddev); if (ret < 0) -- 2.20.1