atm: idt77252: fix dev refcnt leak

[ Upstream commit b5de4a22 ]

init_card() calls dev_get_by_name() to get a network deceive. But it
doesn't decrease network device reference count after the device is
used.
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>

drivers/atm/idt77252.c

@@ -3557,6 +3557,7 @@ init_card(struct atm_dev *dev)
 	if (tmp) {
 		memcpy(card->atmdev->esi, tmp->dev_addr, 6);
 
+		dev_put(tmp);
 		printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
 		       card->name, card->atmdev->esi[0], card->atmdev->esi[1],
 		       card->atmdev->esi[2], card->atmdev->esi[3],