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Subject[PATCH v3] PCI/AER: Fix aerdrv loading with "pcie_ports=native" parameter
Date
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 | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index a2e88386af28..db2c01056dc7 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -283,13 +283,14 @@ static int aer_hest_parse(struct acpi_hest_header *hest_hdr, void *data)

static void aer_set_firmware_first(struct pci_dev *pci_dev)
{
- int rc;
+ int rc = 0;
struct aer_hest_parse_info info = {
.pci_dev = pci_dev,
.firmware_first = 0,
};

- rc = apei_hest_parse(aer_hest_parse, &info);
+ if (!pcie_ports_native)
+ rc = apei_hest_parse(aer_hest_parse, &info);

if (rc)
pci_dev->__aer_firmware_first = 0;
@@ -324,7 +325,9 @@ bool aer_acpi_firmware_first(void)
};

if (!parsed) {
- apei_hest_parse(aer_hest_parse, &info);
+ if (!pcie_ports_native)
+ apei_hest_parse(aer_hest_parse, &info);
+
aer_firmware_first = info.firmware_first;
parsed = true;
}
--
2.14.3
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