diff options
| -rw-r--r-- | drivers/s390/cio/css.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 4e2f2bbf4ba5..46c021d880dc 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -164,7 +164,8 @@ static int css_sch_device_register(struct subchannel *sch) void css_sch_device_unregister(struct subchannel *sch) { mutex_lock(&sch->reg_mutex); - device_unregister(&sch->dev); + if (device_is_registered(&sch->dev)) + device_unregister(&sch->dev); mutex_unlock(&sch->reg_mutex); } EXPORT_SYMBOL_GPL(css_sch_device_unregister); |