tree d42741a7582839ed8740b9cfb99416f2fcf46a6a
parent fed5ea87e02aaf902ff38c65b4514233db03dc09
author Ian Campbell <ian.campbell@citrix.com> 1259668034 +0000
committer Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> 1259867696 -0800

xen: improve error handling in do_suspend.

The existing error handling has a few issues:
- If freeze_processes() fails it exits with shutting_down = SHUTDOWN_SUSPEND.
- If dpm_suspend_noirq() fails it exits without resuming xenbus.
- If stop_machine() fails it exits without resuming xenbus or calling
  dpm_resume_end().
- xs_suspend()/xs_resume() and dpm_suspend_noirq()/dpm_resume_noirq() were not
  nested in the obvious way.

Fix by ensuring each failure case goto's the correct label. Treat a failure of
stop_machine() as a cancelled suspend in order to follow the correct resume
path.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stable Kernel <stable@kernel.org>