dma-debug: disable/enable irqs only once in device_dma_allocations

There is no need to disable/enable irqs on each loop iteration. Just
disable irqs for the whole time the loop runs.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

lib/dma-debug.c

@@ -649,15 +649,19 @@ static int device_dma_allocations(struct device *dev)
 	unsigned long flags;
 	int count = 0, i;
 
+	local_irq_save(flags);
+
 	for (i = 0; i < HASH_SIZE; ++i) {
-		spin_lock_irqsave(&dma_entry_hash[i].lock, flags);
+		spin_lock(&dma_entry_hash[i].lock);
 		list_for_each_entry(entry, &dma_entry_hash[i].list, list) {
 			if (entry->dev == dev)
 				count += 1;
 		}
-		spin_unlock_irqrestore(&dma_entry_hash[i].lock, flags);
+		spin_unlock(&dma_entry_hash[i].lock);
 	}
 
+	local_irq_restore(flags);
+
 	return count;
 }