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authorLeo Yan <leo.yan@linaro.org>2016-03-29 19:27:13 +0800
committerEduardo Valentin <edubezval@gmail.com>2016-05-17 07:28:30 -0700
commit469ace07c29310b1401316e5e910c157c7544af3 (patch)
tree1bd9510d18a18bd272a78fa03f40b63be5c0762a /drivers/thermal
parent439dc96811739ad5440143140fe92df5140daf11 (diff)
downloadlinux-469ace07c29310b1401316e5e910c157c7544af3.tar.bz2
thermal: hisilicon: fix IRQ imbalance enabling
When register sensors into thermal zone during initialization phase, it reports error for IRQ imbalance enabling: [ 2.040713] WARNING: at kernel/irq/manage.c:513 [ 2.040719] Modules linked in: [ 2.040721] [ 2.040729] CPU: 1 PID: 804 Comm: irq/33-hisi_the Not tainted 4.5.0-rc4+ #505 [ 2.040732] Hardware name: HiKey Development Board (DT) [ 2.040736] task: ffffffc03ae82580 ti: ffffffc0379c8000 task.ti: ffffffc0379c8000 [ 2.040745] PC is at __enable_irq+0x74/0x84 [ 2.040749] LR is at __enable_irq+0x74/0x84 This warning is for IRQ imbalance enabling, which is caused by enable_irq() twice. During sensor's initialization it tries to enable IRQ, the driver will call thermal_zone_of_sensor_register() to bind sensors and read sensor's temperature. But at this moment the flag "data->irq_enabled" has been not initialized as correct state, so it finally introduces the function enabled_irq() to be called twice. In essentially this is caused by the flag "data->irq_enabled" is inconsistent with real hardware IRQ enabling state. So this patch is to fix this issue, firstly init "irq_enabled" flag before binding sensors to thermal zone. Also change to use the function irq_get_irqchip_state() to read back real interrupt line state. Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/hisi_thermal.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c
index d3bdbaf0bf13..97fad8f51e1c 100644
--- a/drivers/thermal/hisi_thermal.c
+++ b/drivers/thermal/hisi_thermal.c
@@ -343,6 +343,10 @@ static int hisi_thermal_probe(struct platform_device *pdev)
return ret;
}
+ hisi_thermal_enable_bind_irq_sensor(data);
+ irq_get_irqchip_state(data->irq, IRQCHIP_STATE_MASKED,
+ &data->irq_enabled);
+
for (i = 0; i < HISI_MAX_SENSORS; ++i) {
ret = hisi_thermal_register_sensor(pdev, data,
&data->sensors[i], i);
@@ -353,9 +357,6 @@ static int hisi_thermal_probe(struct platform_device *pdev)
hisi_thermal_toggle_sensor(&data->sensors[i], true);
}
- hisi_thermal_enable_bind_irq_sensor(data);
- data->irq_enabled = true;
-
return 0;
}