diff options
Diffstat (limited to 'drivers/acpi/processor_thermal.c')
| -rw-r--r-- | drivers/acpi/processor_thermal.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c index 641b5450a0d..e8e652710e6 100644 --- a/drivers/acpi/processor_thermal.c +++ b/drivers/acpi/processor_thermal.c @@ -218,9 +218,13 @@ processor_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state) { struct acpi_device *device = cdev->devdata; - struct acpi_processor *pr = acpi_driver_data(device); + struct acpi_processor *pr; - if (!device || !pr) + if (!device) + return -EINVAL; + + pr = acpi_driver_data(device); + if (!pr) return -EINVAL; *state = acpi_processor_max_state(pr); @@ -232,9 +236,13 @@ processor_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *cur_state) { struct acpi_device *device = cdev->devdata; - struct acpi_processor *pr = acpi_driver_data(device); + struct acpi_processor *pr; - if (!device || !pr) + if (!device) + return -EINVAL; + + pr = acpi_driver_data(device); + if (!pr) return -EINVAL; *cur_state = cpufreq_get_cur_state(pr->id); @@ -248,11 +256,15 @@ processor_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) { struct acpi_device *device = cdev->devdata; - struct acpi_processor *pr = acpi_driver_data(device); + struct acpi_processor *pr; int result = 0; int max_pstate; - if (!device || !pr) + if (!device) + return -EINVAL; + + pr = acpi_driver_data(device); + if (!pr) return -EINVAL; max_pstate = cpufreq_get_max_state(pr->id); |