From 469ace07c29310b1401316e5e910c157c7544af3 Mon Sep 17 00:00:00 2001 From: Leo Yan Date: Tue, 29 Mar 2016 19:27:13 +0800 Subject: [PATCH] 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 Signed-off-by: Eduardo Valentin --- drivers/thermal/hisi_thermal.c | 7 ++++--- 1 file 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; }