[PATCH 4.9 103/120] ACPI / CPPC: set an error code on probe error path

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpen...@oracle.com>

commit 501634759d55a5b56967de6d9465acf02bbc3565 upstream.

We should return -EINVAL (instead of 0) if get_cpu_device() fails.

Fixes: 158c998ea44b (ACPI / CPPC: add sysfs support to compute delivered 
performance)
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/acpi/cppc_acpi.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -784,8 +784,10 @@ int acpi_cppc_processor_probe(struct acp
 
        /* Add per logical CPU nodes for reading its feedback counters. */
        cpu_dev = get_cpu_device(pr->id);
-       if (!cpu_dev)
+       if (!cpu_dev) {
+               ret = -EINVAL;
                goto out_free;
+       }
 
        ret = kobject_init_and_add(&cpc_ptr->kobj, &cppc_ktype, &cpu_dev->kobj,
                        "acpi_cppc");