Commit bba50659 authored by Vidya Sagar's avatar Vidya Sagar Committed by Bjorn Helgaas
Browse files

PCI/AER: Configure ECRC only if AER is native 

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: default avatarVidya Sagar <vidyas@nvidia.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 1b929c02

Documentation/admin-guide/kernel-parameters.txt

+3 −1
Original line number Diff line number Diff line
@@ -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

drivers/pci/pcie/aer.c

+3 −0
Original line number Diff line number Diff line
@@ -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;