[PATCH] ntb: idt: drop redundant pci_enable_pcie_error_reporting()

[Bjorn Helgaas <helgaas@kernel.org>]

From: Bjorn Helgaas <bhelgaas@google.com>

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 <bhelgaas@google.com>
---
 drivers/ntb/hw/idt/ntb_hw_idt.c | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

diff --git a/drivers/ntb/hw/idt/ntb_hw_idt.c b/drivers/ntb/hw/idt/ntb_hw_idt.c
index 0ed6f809ff2e..7192ff59dd91 100644
--- a/drivers/ntb/hw/idt/ntb_hw_idt.c
+++ b/drivers/ntb/hw/idt/ntb_hw_idt.c
@@ -2651,20 +2651,18 @@ static int idt_init_pci(struct idt_ntb_dev *ndev)
 	}
 
 	/*
-	 * 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;
 	}
 
 	/*
@@ -2692,8 +2690,6 @@ static int idt_init_pci(struct idt_ntb_dev *ndev)
 
 err_clear_master:
 	pci_clear_master(pdev);
-err_disable_aer:
-	(void)pci_disable_pcie_error_reporting(pdev);
 
 	return ret;
 }
@@ -2714,9 +2710,6 @@ static void idt_deinit_pci(struct idt_ntb_dev *ndev)
 	/* 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");
 }
 
-- 
2.25.1