debug: use dev_WARN() rather than WARN_ON() in device_pm_add()

device_pm_add() has a WARN_ON that is showing relatively high on
kerneloops.org, but unfortunately the WARN_ON is less than useful
in that it doesn't print any information about what device is causing
the issue.

This patch fixes this by turning the WARN_ON() into the newly
introduces dev_WARN() which will print information about the
device in question.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 273a944..b0eb6af 100644 (file)
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -83,7 +83,7 @@ void device_pm_add(struct device *dev)
                 * transition is in progress in order to avoid leaving them
                 * unhandled down the road
                 */
-               WARN_ON(true);
+               dev_WARN(dev, "Parentless device registered during a PM transaction\n");
        }
 
        list_add_tail(&dev->power.entry, &dpm_list);