um: vector: fix missing unlock on error in vector_net_open()

Add the missing unlock before return from function vector_net_open()
in the error handling case.

Fixes: ad1f62ab2bd4 ("High Performance UML Vector Network Driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c
index d1d53015d572..bb83a2d22ac2 100644
--- a/arch/um/drivers/vector_kern.c
+++ b/arch/um/drivers/vector_kern.c
@@ -1156,8 +1156,10 @@ static int vector_net_open(struct net_device *dev)
         struct vector_device *vdevice;
 
         spin_lock_irqsave(&vp->lock, flags);
-        if (vp->opened)
+        if (vp->opened) {
+                spin_unlock_irqrestore(&vp->lock, flags);
                 return -ENXIO;
+        }
         vp->opened = true;
         spin_unlock_irqrestore(&vp->lock, flags);