linux-kernel - [GIT PULL] CPU hotplug fix

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Message-ID: <20170610084703.jou7sljkvrpb4wts@gmail.com>
Date:   Sat, 10 Jun 2017 10:47:03 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] CPU hotplug fix

Linus,

Please pull the latest smp-urgent-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git smp-urgent-for-linus

   # HEAD: 40da1b11f01e43aad1aa6cea64681b6125e8a2a7 cpu/hotplug: Drop the device lock on error

An error handling corner case fix.

 Thanks,

	Ingo

------------------>
Sebastian Andrzej Siewior (1):
      cpu/hotplug: Drop the device lock on error


 kernel/cpu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 9ae6fbe5b5cf..cb5103413bd8 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1658,13 +1658,13 @@ static ssize_t write_cpuhp_target(struct device *dev,
 	ret = !sp->name || sp->cant_stop ? -EINVAL : 0;
 	mutex_unlock(&cpuhp_state_mutex);
 	if (ret)
-		return ret;
+		goto out;
 
 	if (st->state < target)
 		ret = do_cpu_up(dev->id, target);
 	else
 		ret = do_cpu_down(dev->id, target);
-
+out:
 	unlock_device_hotplug();
 	return ret ? ret : count;
 }