net: ethernet: ibm: ehea: ehea_qmr.c: Fix for possible null pointer dereference

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/ibm/ehea/ehea_qmr.c

···
 
 static void hw_queue_dtor(struct hw_queue *queue)
 {
-	int pages_per_kpage = PAGE_SIZE / queue->pagesize;
+	int pages_per_kpage;
 	int i, nr_pages;
 
 	if (!queue || !queue->queue_pages)
 		return;
+
+	pages_per_kpage = PAGE_SIZE / queue->pagesize;
 
 	nr_pages = queue->queue_length / queue->pagesize;