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 <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index bbb7f12..2f97d2f 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -1565,6 +1565,9 @@
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 @@
info->netcount=0;
spin_unlock_irqrestore(&info->netlock, flags);
+ module_put(THIS_MODULE);
return 0;
}