[WATCHDOG] Unlock in iTCO_wdt_start when reboot is disabled

Unlock in iTCO_wdt_start when reboot is disabled

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index cd5a565..185c093 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -300,6 +300,7 @@
 
 	/* disable chipset's NO_REBOOT bit */
 	if (iTCO_wdt_unset_NO_REBOOT_bit()) {
+		spin_unlock(&iTCO_wdt_private.io_lock);
 		printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
 		return -EIO;
 	}