1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index e2c33c06190b..8e25ca7080c7 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -907,6 +907,7 @@ static ssize_t cosa_write(struct file *file,
                         current->state = TASK_RUNNING;
                         chan->tx_status = 1;
                         spin_unlock_irqrestore(&cosa->lock, flags);
+                        up(&chan->wsem);
                         return -ERESTARTSYS;
                 }
         }