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 <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_qmr.c b/drivers/net/ethernet/ibm/ehea/ehea_qmr.c
index 9b03033bb557..a0820f72b25c 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_qmr.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_qmr.c
@@ -103,12 +103,14 @@ out_nomem:
 
 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;
 
         for (i = 0; i < nr_pages; i += pages_per_kpage)