Patch "thermal/drivers/hisi: Fix kernel panic on alarm interrupt" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    thermal/drivers/hisi: Fix kernel panic on alarm interrupt

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     thermal-drivers-hisi-fix-kernel-panic-on-alarm-interrupt.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 2cb4de785c40d4a2132cfc13e63828f5a28c3351 Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Thu, 19 Oct 2017 19:05:45 +0200
Subject: thermal/drivers/hisi: Fix kernel panic on alarm interrupt

From: Daniel Lezcano <daniel.lezcano@linaro.org>

commit 2cb4de785c40d4a2132cfc13e63828f5a28c3351 upstream.

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 <daniel.lezcano@linaro.org>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Kevin Wangtao <kevin.wangtao@hisilicon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/thermal/hisi_thermal.c |   18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

--- a/drivers/thermal/hisi_thermal.c
+++ b/drivers/thermal/hisi_thermal.c
@@ -317,15 +317,6 @@ static int hisi_thermal_probe(struct pla
 	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");
@@ -357,6 +348,15 @@ static int hisi_thermal_probe(struct pla
 			hisi_thermal_toggle_sensor(&data->sensors[i], 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;


Patches currently in stable-queue which might be from daniel.lezcano@linaro.org are

queue-4.9/thermal-drivers-hisi-fix-kernel-panic-on-alarm-interrupt.patch
queue-4.9/thermal-drivers-hisi-fix-multiple-alarm-interrupts-firing.patch
queue-4.9/thermal-drivers-hisi-fix-missing-interrupt-enablement.patch