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Subject[PATCH 01/11] platform/x86: asus-wmi: Fix hwmon device cleanup
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Date
The asus-wmi driver does not clean up the hwmon device on exit or error.
To reproduce the bug, repeat rmmod, insmod to verify that device number
/sys/devices/platform/asus-nb-wmi/hwmon/hwmon?? grows every time. Add
pointer to the device in module state and call cleanup on error.

Signed-off-by: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com>
---
drivers/platform/x86/asus-wmi.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index ee1fa93708ec..6b736a9375ef 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -145,6 +145,7 @@ struct asus_wmi {

struct input_dev *inputdev;
struct backlight_device *backlight_device;
+ struct device *hwmon_device;
struct platform_device *platform_device;

struct led_classdev wlan_led;
@@ -1432,9 +1433,19 @@ static int asus_wmi_hwmon_init(struct asus_wmi *asus)
pr_err("Could not register asus hwmon device\n");
return PTR_ERR(hwmon);
}
+
+ asus->hwmon_device = hwmon;
return 0;
}

+static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
+{
+ if (asus->hwmon_device) {
+ asus_hwmon_fan_set_auto(asus);
+ hwmon_device_unregister(asus->hwmon_device);
+ }
+}
+
/*
* Backlight
*/
@@ -2157,6 +2168,7 @@ static int asus_wmi_add(struct platform_device *pdev)
fail_rfkill:
asus_wmi_led_exit(asus);
fail_leds:
+ asus_wmi_hwmon_exit(asus);
fail_hwmon:
asus_wmi_input_exit(asus);
fail_input:
@@ -2178,7 +2190,7 @@ static int asus_wmi_remove(struct platform_device *device)
asus_wmi_rfkill_exit(asus);
asus_wmi_debugfs_exit(asus);
asus_wmi_platform_exit(asus);
- asus_hwmon_fan_set_auto(asus);
+ asus_wmi_hwmon_exit(asus);

kfree(asus);
return 0;
--
2.17.1
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