In commit 27d868b5e6cf ("PCI: Set MPS to match upstream bridge") Keith made
sure every device's MPS setting matched its upstream bridge, making it more
likely that a hot-added devices would work in a system with an optimized MPS
configuration.
This series augments Keith's approach to include tuning down a Root Port's
MPS setting in the case where a hot-added device is not capable of matching
it (see: [1]).
Testing by Dongdong exposed a bug with the logic including Virtual Functions
(VFs). VFs should not be included so a pre-cursor patch, 1/2, was added to
cover such.
[1] https://bugzilla.kernel.org/show_bug.cgi?id=200527
Myron Stowe (2):
PCI: Skip MPS logic for Virtual Functions (VFs)
PCI: Match Root Port's MPS to endpoint's MPSS as necessary
drivers/pci/probe.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
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