Smatch complained that the ERR_PTR from hwmon_device_register() wasn't handled. I added some error handling in radeon_hwmon_init() to silence the warning.
Unfortunately errors from radeon_pm_init() aren't handled so this doesn't really make a difference beyond silencing the warning.
Also I changed DRM_ERROR() to dev_err() which is the new preferred method.
Signed-off-by: Dan Carpenter error27@gmail.com --- V2: switched from DRM_ERROR() to dev_err()
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 95f8b3a..58038f5 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -472,9 +472,9 @@ static const struct attribute_group hwmon_attrgroup = { .attrs = hwmon_attributes, };
-static void radeon_hwmon_init(struct radeon_device *rdev) +static int radeon_hwmon_init(struct radeon_device *rdev) { - int err; + int err = 0;
rdev->pm.int_hwmon_dev = NULL;
@@ -483,15 +483,26 @@ static void radeon_hwmon_init(struct radeon_device *rdev) case THERMAL_TYPE_RV770: case THERMAL_TYPE_EVERGREEN: rdev->pm.int_hwmon_dev = hwmon_device_register(rdev->dev); + 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); + break; + } dev_set_drvdata(rdev->pm.int_hwmon_dev, rdev->ddev); err = sysfs_create_group(&rdev->pm.int_hwmon_dev->kobj, &hwmon_attrgroup); - if (err) - DRM_ERROR("Unable to create hwmon sysfs file: %d\n", err); + if (err) { + dev_err(rdev->dev, + "Unable to create hwmon sysfs file: %d\n", err); + hwmon_device_unregister(rdev->dev); + } break; default: break; } + + return err; }
static void radeon_hwmon_fini(struct radeon_device *rdev) @@ -540,6 +551,7 @@ void radeon_pm_resume(struct radeon_device *rdev) int radeon_pm_init(struct radeon_device *rdev) { int ret; + /* default to profile method */ rdev->pm.pm_method = PM_METHOD_PROFILE; rdev->pm.profile = PM_PROFILE_DEFAULT; @@ -561,7 +573,9 @@ int radeon_pm_init(struct radeon_device *rdev) }
/* set up the internal thermal sensor if applicable */ - radeon_hwmon_init(rdev); + ret = radeon_hwmon_init(rdev); + if (ret) + return ret; if (rdev->pm.num_power_states > 1) { /* where's the best place to put these? */ ret = device_create_file(rdev->dev, &dev_attr_power_profile);