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| author | Leo Yan <leo.yan@linaro.org> | 2016-03-29 19:27:13 +0800 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2016-05-17 07:28:30 -0700 |
| commit | 469ace07c29310b1401316e5e910c157c7544af3 (patch) | |
| tree | 1bd9510d18a18bd272a78fa03f40b63be5c0762a /drivers/thermal | |
| parent | 439dc96811739ad5440143140fe92df5140daf11 (diff) | |
| download | linux-469ace07c29310b1401316e5e910c157c7544af3.tar.gz linux-469ace07c29310b1401316e5e910c157c7544af3.tar.bz2 linux-469ace07c29310b1401316e5e910c157c7544af3.zip | |
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.c | 7 |
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; } |