[PATCH V2 03/13] thermal/drivers/hisi: Fix kernel panic on alarm interrupt

From: Daniel Lezcano
Date: Mon Sep 04 2017 - 15:57:48 EST


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@xxxxxxxxxx>
Reviewed-by: Leo Yan <leo.yan@xxxxxxxxxx>
Tested-by: Leo Yan <leo.yan@xxxxxxxxxx>
---
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