linux-kernel - [PATCH] workqueue: proper error unwinding in cpu hotplug error path

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Message-ID: <20080715081210.GC22068@localhost.localdomain>
Date:	Tue, 15 Jul 2008 17:12:10 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH] workqueue: proper error unwinding in cpu hotplug error path

Add proper error unwinding in error path in CPU_UP_PREPARE notifier.

Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
---
 kernel/workqueue.c |    9 +++++++++
 1 file changed, 9 insertions(+)

Index: 2.6-mmotm/kernel/workqueue.c
===================================================================
--- 2.6-mmotm.orig/kernel/workqueue.c
+++ 2.6-mmotm/kernel/workqueue.c
@@ -928,6 +928,15 @@ static int __devinit workqueue_cpu_callb
 				break;
 			printk(KERN_ERR "workqueue [%s] for %i failed\n",
 				wq->name, cpu);
+
+			list_for_each_entry_continue_reverse(wq, &workqueues,
+							list) {
+				cwq = per_cpu_ptr(wq->cpu_wq, cpu);
+				start_workqueue_thread(cwq, -1);
+				cleanup_workqueue_thread(cwq);
+			}
+			cpu_clear(cpu, cpu_populated_map);
+
 			return NOTIFY_BAD;
 
 		case CPU_ONLINE:
--
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