synclink_gt fix module reference

Get module reference on open() by generic HDLC to prevent module from
unloading while interface is active.

Signed-off-by: Paul Fulghum <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index bbb7f1292665267bf22f3a59afb455abfb5aaf00..2f97d2f8f916fbd3b003e717e16e9d021632a1bc 100644 (file)
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -1565,6 +1565,9 @@ static int hdlcdev_open(struct net_device *dev)
        int rc;
        unsigned long flags;
 
+       if (!try_module_get(THIS_MODULE))
+               return -EBUSY;
+
        DBGINFO(("%s hdlcdev_open\n", dev->name));
 
        /* generic HDLC layer open processing */
@@ -1634,6 +1637,7 @@ static int hdlcdev_close(struct net_device *dev)
        info->netcount=0;
        spin_unlock_irqrestore(&info->netlock, flags);
 
+       module_put(THIS_MODULE);
        return 0;
 }