Re: [PATCH 1/4] drm/radeon: properly unregister hwmon interface (v2)

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Am 15.04.2014 18:44, schrieb Alex Deucher:
Need to properly unregister the hwmon device on driver
unload.

v2: minor clean up

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=73931

Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx

Added to my 3.15 queue.

Sorry for the delay, those patches somehow got lost in my inbox.

Christian.

---
  drivers/gpu/drm/radeon/radeon_pm.c | 21 +++++++++++++++------
  1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index ee738a5..e0a664d 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -603,7 +603,6 @@ static const struct attribute_group *hwmon_groups[] = {
  static int radeon_hwmon_init(struct radeon_device *rdev)
  {
  	int err = 0;
-	struct device *hwmon_dev;
switch (rdev->pm.int_thermal_type) {
  	case THERMAL_TYPE_RV6XX:
@@ -616,11 +615,11 @@ static int radeon_hwmon_init(struct radeon_device *rdev)
  	case THERMAL_TYPE_KV:
  		if (rdev->asic->pm.get_temperature == NULL)
  			return err;
-		hwmon_dev = hwmon_device_register_with_groups(rdev->dev,
-							      "radeon", rdev,
-							      hwmon_groups);
-		if (IS_ERR(hwmon_dev)) {
-			err = PTR_ERR(hwmon_dev);
+		rdev->pm.int_hwmon_dev = hwmon_device_register_with_groups(rdev->dev,
+									   "radeon", rdev,
+									   hwmon_groups);
+		if (IS_ERR(rdev->pm.int_hwmon_dev)) {
+			err = PTR_ERR(rdev->pm.int_hwmon_dev);
  			dev_err(rdev->dev,
  				"Unable to register hwmon device: %d\n", err);
  		}
@@ -632,6 +631,12 @@ static int radeon_hwmon_init(struct radeon_device *rdev)
  	return err;
  }
+static void radeon_hwmon_fini(struct radeon_device *rdev)
+{
+	if (rdev->pm.int_hwmon_dev)
+		hwmon_device_unregister(rdev->pm.int_hwmon_dev);
+}
+
  static void radeon_dpm_thermal_work_handler(struct work_struct *work)
  {
  	struct radeon_device *rdev =
@@ -1353,6 +1358,8 @@ static void radeon_pm_fini_old(struct radeon_device *rdev)
  		device_remove_file(rdev->dev, &dev_attr_power_method);
  	}
+ radeon_hwmon_fini(rdev);
+
  	if (rdev->pm.power_state)
  		kfree(rdev->pm.power_state);
  }
@@ -1372,6 +1379,8 @@ static void radeon_pm_fini_dpm(struct radeon_device *rdev)
  	}
  	radeon_dpm_fini(rdev);
+ radeon_hwmon_fini(rdev);
+
  	if (rdev->pm.power_state)
  		kfree(rdev->pm.power_state);
  }

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