qlcnic: Fix NULL dereference in error path.

o Fix for smatch tool reported error
   drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c:2029
   qlcnic_probe() error: potential NULL dereference 'adapter'.
o While returning from an error path in probe, adapter is not
  initialized. So do not access adapter in cleanup path.

Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index 3ee593e..0d00b2b 100644 (file)
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
@@ -546,11 +546,10 @@ void qlcnic_teardown_intr(struct qlcnic_adapter *adapter)
        }
 }
 
-static void
-qlcnic_cleanup_pci_map(struct qlcnic_adapter *adapter)
+static void qlcnic_cleanup_pci_map(struct qlcnic_hardware_context *ahw)
 {
-       if (adapter->ahw->pci_base0 != NULL)
-               iounmap(adapter->ahw->pci_base0);
+       if (ahw->pci_base0 != NULL)
+               iounmap(ahw->pci_base0);
 }
 
 static int qlcnic_get_act_pci_func(struct qlcnic_adapter *adapter)
@@ -2026,7 +2025,7 @@ err_out_free_netdev:
        free_netdev(netdev);
 
 err_out_iounmap:
-       qlcnic_cleanup_pci_map(adapter);
+       qlcnic_cleanup_pci_map(ahw);
 
 err_out_free_hw_res:
        kfree(ahw);
@@ -2083,7 +2082,7 @@ static void qlcnic_remove(struct pci_dev *pdev)
 
        qlcnic_remove_sysfs(adapter);
 
-       qlcnic_cleanup_pci_map(adapter);
+       qlcnic_cleanup_pci_map(adapter->ahw);
 
        qlcnic_release_firmware(adapter);