wan: cosa: drop chan->wsem on error path

The other paths all drop chan->wsem.  This was found by a static
checker (smatch).

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index e2c33c0..8e25ca7 100644 (file)
--- 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;
                }
        }