Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754031AbdIDT5p (ORCPT ); Mon, 4 Sep 2017 15:57:45 -0400 Received: from mail-wr0-f169.google.com ([209.85.128.169]:36292 "EHLO mail-wr0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753984AbdIDT5h (ORCPT ); Mon, 4 Sep 2017 15:57:37 -0400 X-Google-Smtp-Source: ADKCNb7BoQdNcM+0+iQifdjITlo9DOh+q7+DIq9cfYMNnXiCy9cuV3ruvmFp013SJgazNyGJco1SDg== From: Daniel Lezcano To: rui.zhang@intel.com, edubezval@gmail.com Cc: daniel.lezcano@linaro.org, linux-pm@vger.kernel.org, kevin.wangtao@linaro.org, leo.yan@linaro.org, linux-kernel@vger.kernel.org Subject: [PATCH V2 03/13] thermal/drivers/hisi: Fix kernel panic on alarm interrupt Date: Mon, 4 Sep 2017 21:56:02 +0200 Message-Id: <1504554972-2624-3-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1504554972-2624-1-git-send-email-daniel.lezcano@linaro.org> References: <1504554972-2624-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1645 Lines: 51 The threaded interrupt for the alarm interrupt is requested before the temperature controller is setup. This one can fire an interrupt immediately leading to a kernel panic as the sensor data is not initialized. In order to prevent that, move the threaded irq after the Tsensor is setup. Signed-off-by: Daniel Lezcano Reviewed-by: Leo Yan Tested-by: Leo Yan --- drivers/thermal/hisi_thermal.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c index 725d0d4..f69aea0 100644 --- a/drivers/thermal/hisi_thermal.c +++ b/drivers/thermal/hisi_thermal.c @@ -287,15 +287,6 @@ static int hisi_thermal_probe(struct platform_device *pdev) if (data->irq < 0) return data->irq; - ret = devm_request_threaded_irq(&pdev->dev, data->irq, - hisi_thermal_alarm_irq, - hisi_thermal_alarm_irq_thread, - 0, "hisi_thermal", data); - if (ret < 0) { - dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); - return ret; - } - platform_set_drvdata(pdev, data); data->clk = devm_clk_get(&pdev->dev, "thermal_clk"); @@ -328,6 +319,15 @@ static int hisi_thermal_probe(struct platform_device *pdev) hisi_thermal_toggle_sensor(&data->sensors, true); + ret = devm_request_threaded_irq(&pdev->dev, data->irq, + hisi_thermal_alarm_irq, + hisi_thermal_alarm_irq_thread, + 0, "hisi_thermal", data); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); + return ret; + } + enable_irq(data->irq); return 0; -- 2.7.4