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authorNeilBrown <neilb@suse.de>2009-03-30 23:39:39 -0400
committerNeilBrown <neilb@suse.de>2009-03-30 23:39:39 -0400
commite0cf8f045b2023b0b3f919ee93eb94345f648434 (patch)
tree21d8d0741a5ae4676fea5b53939cc806ae2b41bd /drivers/md/md.c
parent91adb56473febeeb3ef657bb5147ddd355465700 (diff)
md: md_unregister_thread should cope with being passed NULL
Mostly md_unregister_thread is only called when we know that the thread is NULL, but sometimes we need to check first. It is safer to put the check inside md_unregister_thread itself. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 117ea5fde568..f30f09cb08e8 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5382,6 +5382,8 @@ mdk_thread_t *md_register_thread(void (*run) (mddev_t *), mddev_t *mddev,
5382 5382
5383void md_unregister_thread(mdk_thread_t *thread) 5383void md_unregister_thread(mdk_thread_t *thread)
5384{ 5384{
5385 if (!thread)
5386 return;
5385 dprintk("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk)); 5387 dprintk("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk));
5386 5388
5387 kthread_stop(thread->tsk); 5389 kthread_stop(thread->tsk);