staging: wlags49_h2: fix error handling in pcmcia probe function

wl_adapter_attach() ignores some important issues
such as register_netdev() failure. The patch fixes it.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlags49_h2/wl_cs.c

@@ -133,6 +133,7 @@ static int wl_adapter_attach(struct pcmcia_device *link)
 {
 	struct net_device   *dev;
 	struct wl_private   *lp;
+	int ret;
 	/*--------------------------------------------------------------------*/
 
 	DBG_FUNC("wl_adapter_attach");
@@ -154,10 +155,12 @@ static int wl_adapter_attach(struct pcmcia_device *link)
 	lp = wl_priv(dev);
 	lp->link = link;
 
-	wl_adapter_insert(link);
+	ret = wl_adapter_insert(link);
+	if (ret != 0)
+		wl_device_dealloc(dev);
 
 	DBG_LEAVE(DbgInfo);
-	return 0;
+	return ret;
 } /* wl_adapter_attach */
 /*============================================================================*/
 
@@ -224,7 +227,7 @@ static int wl_adapter_resume(struct pcmcia_device *link)
 	return 0;
 } /* wl_adapter_resume */
 
-void wl_adapter_insert(struct pcmcia_device *link)
+int wl_adapter_insert(struct pcmcia_device *link)
 {
 	struct net_device *dev;
 	int ret;
@@ -267,13 +270,13 @@ void wl_adapter_insert(struct pcmcia_device *link)
 		" %pM\n", dev->name, dev->base_addr, dev->irq, dev->dev_addr);
 
 	DBG_LEAVE(DbgInfo);
-	return;
+	return 0;
 
 failed:
 	wl_adapter_release(link);
 
 	DBG_LEAVE(DbgInfo);
-	return;
+	return ret;
 } /* wl_adapter_insert */
 /*============================================================================*/
 

drivers/staging/wlags49_h2/wl_cs.h

@@ -65,10 +65,10 @@
 
 
 /*******************************************************************************
- *  function protoypes
+ *  function prototypes
  ******************************************************************************/
 
-void wl_adapter_insert(struct pcmcia_device *link);
+int wl_adapter_insert(struct pcmcia_device *link);
 
 void wl_adapter_release(struct pcmcia_device *link);