[PATCH v2] PCI/AER: Fix aerdrv loading with "pcie_ports=native" parameter

[Alexandru Gagniuc <mr.nuke.me@gmail.com>]

According to the documentation, "pcie_ports=native", linux should use
native AER and DPC services. While that is true for the _OSC method
parsing, this is not the only place that is checked. Should the HEST
table list PCIe ports as firmware-first, linux will not use native
services.

This happens because aer_acpi_firmware_first() doesn't take
'pcie_ports' into account. This is wrong. DPC uses the same logic when
it decides whether to load or not, so fixing this also fixes DPC not
loading.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
---
 drivers/pci/pcie/aer.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Changes since v1:
 - Re-tested with latest and greatest (v4.18-rc1) -- works great

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index a2e88386af28..98ced0f7c850 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -291,7 +291,7 @@ static void aer_set_firmware_first(struct pci_dev *pci_dev)
 
 	rc = apei_hest_parse(aer_hest_parse, &info);
 
-	if (rc)
+	if (rc || pcie_ports_native)
 		pci_dev->__aer_firmware_first = 0;
 	else
 		pci_dev->__aer_firmware_first = info.firmware_first;
@@ -327,6 +327,9 @@ bool aer_acpi_firmware_first(void)
 		apei_hest_parse(aer_hest_parse, &info);
 		aer_firmware_first = info.firmware_first;
 		parsed = true;
+		if (pcie_ports_native)
+			aer_firmware_first = 0;
+
 	}
 	return aer_firmware_first;
 }
-- 
2.14.3