PM: no suspend_prepare() phase

Remove the new suspend_prepare() phase.  It doesn't seem very usable,
has never been tested, doesn't address fault cleanup, and would need
a sibling resume_complete(); plus there are no real use cases.  It
could be restored later if those issues get resolved.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 27 deletions

diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c
index e86db83746ac..6453c25103d2 100644
--- a/drivers/base/power/suspend.c
+++ b/drivers/base/power/suspend.c
@@ -118,33 +118,6 @@ static int suspend_device_late(struct device *dev, pm_message_t state)
 }
 
 /**
- *      device_prepare_suspend - save state and prepare to suspend
- *
- *      NOTE! Devices cannot detach at this point - not only do we
- *      hold the device list semaphores over the whole prepare, but
- *      the whole point is to do non-invasive preparatory work, not
- *      the actual suspend.
- */
-int device_prepare_suspend(pm_message_t state)
-{
-        int error = 0;
-        struct device * dev;
-
-        down(&dpm_sem);
-        down(&dpm_list_sem);
-        list_for_each_entry_reverse(dev, &dpm_active, power.entry) {
-                if (!dev->bus || !dev->bus->suspend_prepare)
-                        continue;
-                error = dev->bus->suspend_prepare(dev, state);
-                if (error)
-                        break;
-        }
-        up(&dpm_list_sem);
-        up(&dpm_sem);
-        return error;
-}
-
-/**
  *      device_suspend - Save state and stop all devices in system.
  *      @state:         Power state to put each device in.
  *