linux-kernel - [PATCH] ehca: fix kthread

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Date:	Tue, 19 Dec 2006 17:42:48 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>
Subject: [PATCH] ehca: fix kthread_create() error check

The return value of kthread_create() should be checked by
IS_ERR(). create_comp_task() returns the return value from
kthread_create().

Cc: Hoang-Nam Nguyen <hnguyen@...ibm.com>
Cc: Christoph Raisch <raisch@...ibm.com>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>

---
 drivers/infiniband/hw/ehca/ehca_irq.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Index: 2.6-mm/drivers/infiniband/hw/ehca/ehca_irq.c
===================================================================
--- 2.6-mm.orig/drivers/infiniband/hw/ehca/ehca_irq.c
+++ 2.6-mm/drivers/infiniband/hw/ehca/ehca_irq.c
@@ -670,11 +670,13 @@ static int comp_pool_callback(struct not
 {
 	unsigned int cpu = (unsigned long)hcpu;
 	struct ehca_cpu_comp_task *cct;
+	struct task_struct *task;
 
 	switch (action) {
 	case CPU_UP_PREPARE:
 		ehca_gen_dbg("CPU: %x (CPU_PREPARE)", cpu);
-		if(!create_comp_task(pool, cpu)) {
+		task = create_comp_task(pool, cpu);
+		if (IS_ERR(task)) {
 			ehca_gen_err("Can't create comp_task for cpu: %x", cpu);
 			return NOTIFY_BAD;
 		}
@@ -730,7 +732,7 @@ int ehca_create_comp_pool(void)
 
 	for_each_online_cpu(cpu) {
 		task = create_comp_task(pool, cpu);
-		if (task) {
+		if (!IS_ERR(task)) {
 			kthread_bind(task, cpu);
 			wake_up_process(task);
 		}
-
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