linux-kernel - [PATCH 4/6] kexec jump: in sync with hibernation implementation

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Message-Id: <1218099932.5164.35.camel@caritas-dev.intel.com>
Date:	Thu, 07 Aug 2008 17:05:32 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Pavel Machek <pavel@....cz>, nigel@...el.suspend2.net,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vivek Goyal <vgoyal@...hat.com>, mingo@...e.hu,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Kexec Mailing List <kexec@...ts.infradead.org>
Subject: [PATCH 4/6] kexec jump: in sync with hibernation implementation

Add device_pm_lock() and device_pm_unlock() in kernel_kexec() to be
in sync with current hibernation implementation.

Signed-off-by: Huang Ying <ying.huang@...el.com>

---
 kernel/kexec.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -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);


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