e1000e: Simplify MSI interrupt testing

The code is quite convoluted, simplify it. This also avoids calling
e1000_request_irq() without testing the value it returned, which was
bad.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Bruce Allan <bruce.w.allan@intel.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index c9b66f4727e4535eb2de110133d86f0229eb36b0..e2c7e0d767b1861c05edec6b008b49020b78e7ad 100644 (file)
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -3412,22 +3412,16 @@ static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
 
        if (adapter->flags & FLAG_MSI_TEST_FAILED) {
                adapter->int_mode = E1000E_INT_MODE_LEGACY;
-               err = -EIO;
-               e_info("MSI interrupt test failed!\n");
-       }
+               e_info("MSI interrupt test failed, using legacy interrupt.\n");
+       } else
+               e_dbg("MSI interrupt test succeeded!\n");
 
        free_irq(adapter->pdev->irq, netdev);
        pci_disable_msi(adapter->pdev);
 
-       if (err == -EIO)
-               goto msi_test_failed;
-
-       /* okay so the test worked, restore settings */
-       e_dbg("MSI interrupt test succeeded!\n");
 msi_test_failed:
        e1000e_set_interrupt_capability(adapter);
-       e1000_request_irq(adapter);
-       return err;
+       return e1000_request_irq(adapter);
 }
 
 /**
@@ -3459,21 +3453,6 @@ static int e1000_test_msi(struct e1000_adapter *adapter)
                pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
        }
 
-       /* success ! */
-       if (!err)
-               return 0;
-
-       /* EIO means MSI test failed */
-       if (err != -EIO)
-               return err;
-
-       /* back to INTx mode */
-       e_warn("MSI interrupt test failed, using legacy interrupt.\n");
-
-       e1000_free_irq(adapter);
-
-       err = e1000_request_irq(adapter);
-
        return err;
 }