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