cxgb3: avoid potential memory leak.

Add consistency in alloc_ring() parameter checking
to avoid potential memory leaks.
alloc_ring() callers are correct fo far.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index 268f15801ec..bc6a8dcb8cc 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -549,16 +549,15 @@ static void *alloc_ring(struct pci_dev *pdev, size_t nelem, size_t elem_size,
 
         if (!p)
                 return NULL;
-        if (sw_size) {
+        if (sw_size && metadata) {
                 s = kcalloc(nelem, sw_size, GFP_KERNEL);
 
                 if (!s) {
                         dma_free_coherent(&pdev->dev, len, p, *phys);
                         return NULL;
                 }
-        }
-        if (metadata)
                 *(void **)metadata = s;
+        }
         memset(p, 0, len);
         return p;
 }