net: ethernet: ax88796: avoid null pointer dereference

If platform_get_resource fails, mem2 is null.
Do not dereference null.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/8390/ax88796.c b/drivers/net/ethernet/8390/ax88796.c
index 5698f53..39ca935 100644 (file)
--- a/drivers/net/ethernet/8390/ax88796.c
+++ b/drivers/net/ethernet/8390/ax88796.c
@@ -910,7 +910,8 @@ static int ax_probe(struct platform_device *pdev)
        iounmap(ax->map2);
 
  exit_mem2:
-       release_mem_region(mem2->start, mem2_size);
+       if (mem2)
+               release_mem_region(mem2->start, mem2_size);
 
  exit_mem1:
        iounmap(ei_local->mem);