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PCI/AER: Configure ECRC only if AER is native

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As the ECRC configuration bits are part of AER registers, configure ECRC
only if AER is natively owned by the kernel.

Link: https://lore.kernel.org/r/20230112072111.20063-1-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Vidya Sagar 2023-01-12 12:51:11 +05:30 committed by Bjorn Helgaas
parent 1b929c02af
commit bba5065963
2 changed files with 6 additions and 1 deletions
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4
Documentation/admin-guide/kernel-parameters.txt
View File

@ -4296,7 +4296,9 @@
specified, e.g., 12@pci:8086:9c22:103c:198f
for 4096-byte alignment.
ecrc= Enable/disable PCIe ECRC (transaction layer
end-to-end CRC checking).
end-to-end CRC checking). Only effective if
OS has native AER control (either granted by
ACPI _OSC or forced via "pcie_ports=native")
bios: Use BIOS/firmware settings. This is the
the default.
off: Turn ECRC off

3
drivers/pci/pcie/aer.c
View File

@ -184,6 +184,9 @@ static int disable_ecrc_checking(struct pci_dev *dev)
*/
void pcie_set_ecrc_checking(struct pci_dev *dev)
{
if (!pcie_aer_is_native(dev))
return;
switch (ecrc_policy) {
case ECRC_POLICY_DEFAULT:
return;