linux-kernel - [PATCH] synclink_gt fix module reference

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Date:	Tue, 14 Aug 2007 12:39:15 -0500
From:	Paul Fulghum <paulkf@...rogate.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] 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@...rogate.com>

--- a/drivers/char/synclink_gt.c	2007-07-08 18:32:17.000000000 -0500
+++ b/drivers/char/synclink_gt.c	2007-08-14 12:27:50.000000000 -0500
@@ -1570,6 +1570,9 @@ static int hdlcdev_open(struct net_devic
 	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 */
@@ -1639,6 +1642,7 @@ static int hdlcdev_close(struct net_devi
 	info->netcount=0;
 	spin_unlock_irqrestore(&info->netlock, flags);
 
+	module_put(THIS_MODULE);
 	return 0;
 }
 


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