On Tue, 17 Jul 2018 11:02:03 -0600
Logan Gunthorpe [off-list ref] wrote:

Intel SPT PCH hardware has an implementation of the ACS bits that
does not comply with the PCI express standard. To deal with this
the existing code has an enable_acs() quirk for the hardware.

In order to be able to correctly disable the ACS redirect bits for
all hardware we need an analagous quirk to disable those bits.

This adds the function pci_dev_specific_disable_acs_redir() which
behaves similarly to pci_dev_specific_enable_acs() but uses a new
function pointer for quirks which disables the ACS redirect bits.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
---
 drivers/pci/quirks.c | 78 ++++++++++++++++++++++++++++++++++++++++++++--------
 include/linux/pci.h  |  5 ++++
 2 files changed, 71 insertions(+), 12 deletions(-)

Reviewed-by: Alex Williamson <redacted>
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