PM: Do not acquire device semaphores upfront during suspend

Remove the code that acquires all device semaphores from the suspend
code path as it causes multiple problems to appear (most notably,
http://bugzilla.kernel.org/show_bug.cgi?id=10030) and revert the
change introduced by commit 4145ed6dc597a9bea5f6ae8c574653b2de10620f
depending on the code being removed.

Remove pm_sleep_lock()/pm_sleep_unlock() from device_add() to avoid
the issue reported at http://bugzilla.kernel.org/show_bug.cgi?id=9874.

It should fix the regreesions reported at:
	http://bugzilla.kernel.org/show_bug.cgi?id=9874
	http://bugzilla.kernel.org/show_bug.cgi?id=10030

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 8 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 9c0070b5bd3e..1e2e0fa8a450 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -770,13 +770,6 @@ int device_add(struct device *dev)
         struct class_interface *class_intf;
         int error;
 
-        error = pm_sleep_lock();
-        if (error) {
-                dev_warn(dev, "Suspicious %s during suspend\n", __FUNCTION__);
-                dump_stack();
-                return error;
-        }
-
         dev = get_device(dev);
         if (!dev || !strlen(dev->bus_id)) {
                 error = -EINVAL;
@@ -843,7 +836,6 @@ int device_add(struct device *dev)
         }
  Done:
         put_device(dev);
-        pm_sleep_unlock();
         return error;
  BusError:
         device_pm_remove(dev);