kexec jump: in sync with hibernation implementation
authorHuang Ying <ying.huang@intel.com>
Fri, 15 Aug 2008 07:40:24 +0000 (00:40 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 15 Aug 2008 15:35:42 +0000 (08:35 -0700)
Add device_pm_lock() and device_pm_unlock() in kernel_kexec() in sync with
current hibernation implementation.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/kexec.c

index b81682312dc442d6cf6c026ac7e75c028387e6dc..17c80fdc453be9c332532aa2deb7bbd9e9167519 100644 (file)
@@ -1457,6 +1457,7 @@ int kernel_kexec(void)
                error = disable_nonboot_cpus();
                if (error)
                        goto Resume_devices;
+               device_pm_lock();
                local_irq_disable();
                /* At this point, device_suspend() has been called,
                 * but *not* device_power_down(). We *must*
@@ -1485,6 +1486,7 @@ int kernel_kexec(void)
                device_power_up(PMSG_RESTORE);
  Enable_irqs:
                local_irq_enable();
+               device_pm_unlock();
                enable_nonboot_cpus();
  Resume_devices:
                device_resume(PMSG_RESTORE);