1 files changed, 14 insertions, 7 deletions

diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index e2c33c06190b..b36bf96eb502 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -297,8 +297,8 @@ static ssize_t cosa_write(struct file *file,
 static unsigned int cosa_poll(struct file *file, poll_table *poll);
 static int cosa_open(struct inode *inode, struct file *file);
 static int cosa_release(struct inode *inode, struct file *file);
-static int cosa_chardev_ioctl(struct inode *inode, struct file *file,
-        unsigned int cmd, unsigned long arg);
+static long cosa_chardev_ioctl(struct file *file, unsigned int cmd,
+                                unsigned long arg);
 #ifdef COSA_FASYNC_WORKING
 static int cosa_fasync(struct inode *inode, struct file *file, int on);
 #endif
@@ -309,7 +309,7 @@ static const struct file_operations cosa_fops = {
         .read           = cosa_read,
         .write          = cosa_write,
         .poll           = cosa_poll,
-        .ioctl          = cosa_chardev_ioctl,
+        .unlocked_ioctl = cosa_chardev_ioctl,
         .open           = cosa_open,
         .release        = cosa_release,
 #ifdef COSA_FASYNC_WORKING
@@ -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;
                 }
         }
@@ -1204,12 +1205,18 @@ static int cosa_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
         return hdlc_ioctl(dev, ifr, cmd);
 }
 
-static int cosa_chardev_ioctl(struct inode *inode, struct file *file,
-        unsigned int cmd, unsigned long arg)
+static long cosa_chardev_ioctl(struct file *file, unsigned int cmd,
+                                                        unsigned long arg)
 {
         struct channel_data *channel = file->private_data;
-        struct cosa_data *cosa = channel->cosa;
-        return cosa_ioctl_common(cosa, channel, cmd, arg);
+        struct cosa_data *cosa;
+        long ret;
+
+        lock_kernel();
+        cosa = channel->cosa;
+        ret = cosa_ioctl_common(cosa, channel, cmd, arg);
+        unlock_kernel();
+        return ret;
 }