| Message ID | 20180813181931.105655.22182.stgit@tak.stowe (mailing list archive) |
|---|---|
| Headers | show |
| Series | Augment device matching its upstream Root Port's MPS logic | expand |
On Mon, Aug 13, 2018 at 12:19:31PM -0600, Myron Stowe wrote: > 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(-) Applied to pci/enumeration for v4.19, thanks!
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(-) --