Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.18 097/235] PCI/AER: Honor "pcie_ports=native" even if HEST sets FIRMWARE_FIRST | Date | Mon, 24 Sep 2018 13:51:23 +0200 |
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4.18-stable review patch. If anyone has any objections, please let me know.
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From: Alexandru Gagniuc <mr.nuke.me@gmail.com>
[ Upstream commit 7af02fcd84c16801958936f88b848944c726ca07 ]
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 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> [bhelgaas: return "false" from bool function (from kbuild robot)] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/pci/pcie/aer.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -303,6 +303,9 @@ int pcie_aer_get_firmware_first(struct p if (!pci_is_pcie(dev)) return 0; + if (pcie_ports_native) + return 0; + if (!dev->__aer_firmware_first_valid) aer_set_firmware_first(dev); return dev->__aer_firmware_first; @@ -323,6 +326,9 @@ bool aer_acpi_firmware_first(void) .firmware_first = 0, }; + if (pcie_ports_native) + return false; + if (!parsed) { apei_hest_parse(aer_hest_parse, &info); aer_firmware_first = info.firmware_first;
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