diff --git a/drivers/watchdog/ibmasr.c b/drivers/watchdog/ibmasr.c
index b82405cfb4cd38534bac8235c8720b7382af5a05..89fcefcc8510da969bfb13a99677e4f73faf7463 100644
--- a/drivers/watchdog/ibmasr.c
+++ b/drivers/watchdog/ibmasr.c
@@ -85,7 +85,6 @@ static void __asr_toggle(void)
 
 	outb(reg & ~asr_toggle_mask, asr_write_addr);
 	reg = inb(asr_read_addr);
-	spin_unlock(&asr_lock);
 }
 
 static void asr_toggle(void)