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PTR_ERR should be called before its argument is cleared. 

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e,e1;
constant c;
@@

*e = c
... when != e = e1
    when != &e
    when != true IS_ERR(e)
*PTR_ERR(e)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reported-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Julia Lawall 2012-02-02 07:52:54 -08:00 committed by Paul E. McKenney
parent bde23c6892
commit 3c1b1ce00d
1 changed files with 4 additions and 1 deletions
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5
kernel/rcutorture.c
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@ -1465,12 +1465,15 @@ rcu_torture_onoff(void *arg)
static int __cpuinit
rcu_torture_onoff_init(void)
{
int ret;
if (onoff_interval <= 0)
return 0;
onoff_task = kthread_run(rcu_torture_onoff, NULL, "rcu_torture_onoff");
if (IS_ERR(onoff_task)) {
ret = PTR_ERR(onoff_task);
onoff_task = NULL;
return PTR_ERR(onoff_task);
return ret;
}
return 0;
}