[patch] cpuidle: checking the wrong variable in__cpuidle_register_device()

[Dan Carpenter]

We updated this in 8a25a2fd12 "cpu: convert 'cpu' and 'machinecheck'
sysdev_class to a regular subsystem" but it should be checking "cpu_dev"
here not "dev".  The "dev" variable was dereferenced already.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 59f4261..7771810 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -294,7 +294,7 @@ static int __cpuidle_register_device(struct cpuidle_device *dev)
 	struct device *cpu_dev = get_cpu_device((unsigned long)dev->cpu);
 	struct cpuidle_driver *cpuidle_driver = cpuidle_get_driver();
 
-	if (!dev)
+	if (!cpu_dev)
 		return -EINVAL;
 	if (!try_module_get(cpuidle_driver->owner))
 		return -EINVAL;
--
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