PM / OPP: fix warning in of_free_opp_table()

Not having OPP defined for a device is not a crime, we should not splat
warning in this case. Also, it seems that we are ready to accept invalid
dev (find_device_opp will return ERR_PTR(-EINVAL) then) so let's not
crash in dev_name() in such case.

Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index b78c14d30da2..aac7abcf74f8 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -799,9 +799,15 @@ void of_free_opp_table(struct device *dev)
 
         /* Check for existing list for 'dev' */
         dev_opp = find_device_opp(dev);
-        if (WARN(IS_ERR(dev_opp), "%s: dev_opp: %ld\n", dev_name(dev),
-                 PTR_ERR(dev_opp)))
+        if (IS_ERR(dev_opp)) {
+                int error = PTR_ERR(dev_opp);
+                if (error != -ENODEV)
+                        WARN(1, "%s: dev_opp: %d\n",
+                             IS_ERR_OR_NULL(dev) ?
+                                        "Invalid device" : dev_name(dev),
+                             error);
                 return;
+        }
 
         /* Hold our list modification lock here */
         mutex_lock(&dev_opp_list_lock);