cpuidle: Clean up cpuidle_enable_device() error handling a bit

Do not fetch per CPU drv if cpuidle_curr_governor is NULL
to avoid useless per CPU processing.

Signed-off-by: Gaurav Jindal <gauravjindal1104@gmail.com>
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index ed4df58..27f9648 100644 (file)
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -388,9 +388,12 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
        if (dev->enabled)
                return 0;
 
+       if (!cpuidle_curr_governor)
+               return -EIO;
+
        drv = cpuidle_get_cpu_driver(dev);
 
-       if (!drv || !cpuidle_curr_governor)
+       if (!drv)
                return -EIO;
 
        if (!dev->registered)