diff --git a/drivers/net/ethernet/sun/cassini.c b/drivers/net/ethernet/sun/cassini.c
index 0aca193d9550..800956d5464b 100644
--- a/drivers/net/ethernet/sun/cassini.c
+++ b/drivers/net/ethernet/sun/cassini.c
@@ -5095,6 +5095,8 @@ err_out_iounmap:
 		cas_shutdown(cp);
 	mutex_unlock(&cp->pm_mutex);
 
+	vfree(cp->fw_data);
+
 	pci_iounmap(pdev, cp->regs);