ntb: idt: drop redundant pci_enable_pcie_error_reporting()

pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages. Since f26e58bf6f54 ("PCI/AER: Enable error reporting when AER is
native"), the PCI core does this for all devices during enumeration, so the
driver doesn't need to do it itself.

Remove the redundant pci_enable_pcie_error_reporting() call from the
driver. Also remove the corresponding pci_disable_pcie_error_reporting()
from the driver .remove() path.

Note that this only controls ERR_* Messages from the device. An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.

Signed-off-by: Bjorn Helgaas <[e-mail]>
Acked-by: Serge Semin <[e-mail]>
Signed-off-by: Jon Mason <[e-mail]>

drivers/ntb/hw/idt/ntb_hw_idt.c

···
 	}
 
 	/*
-	 * Enable the device advanced error reporting. It's not critical to
+	 * The PCI core enables device error reporting. It's not critical to
 	 * have AER disabled in the kernel.
+	 *
+	 * Cleanup nonfatal error status before getting to init.
 	 */
-	ret = pci_enable_pcie_error_reporting(pdev);
-	if (ret != 0)
-		dev_warn(&pdev->dev, "PCIe AER capability disabled\n");
-	else /* Cleanup nonfatal error status before getting to init */
-		pci_aer_clear_nonfatal_status(pdev);
+	pci_aer_clear_nonfatal_status(pdev);
 
 	/* First enable the PCI device */
 	ret = pcim_enable_device(pdev);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to enable PCIe device\n");
-		goto err_disable_aer;
+		return ret;
 	}
 
 	/*
···
 
 err_clear_master:
 	pci_clear_master(pdev);
-err_disable_aer:
-	(void)pci_disable_pcie_error_reporting(pdev);
 
 	return ret;
 }
···
 
 	/* Clear the bus master disabling the Request TLPs translation */
 	pci_clear_master(pdev);
-
-	/* Disable the AER capability */
-	(void)pci_disable_pcie_error_reporting(pdev);
 
 	dev_dbg(&pdev->dev, "NT-function PCIe interface cleared");
 }