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| author | Bjorn Helgaas <bhelgaas@google.com> | 2020-05-21 15:40:07 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2020-05-21 15:53:07 -0500 |
| commit | 7b38fd9760f51cc83d80eed2cfbde8b5ead9e93a (patch) | |
| tree | 548c59cd8b6a79a5a19f7b62bb29a507a4b9f077 /drivers/pci/pcie/err.c | |
| parent | aa0ce96d72dd2e1b0dfd0fb868f82876e7790878 (diff) | |
PCI/PTM: Inherit Switch Downstream Port PTM settings from Upstream Port
Except for Endpoints, we enable PTM at enumeration-time. Previously we did
not account for the fact that Switch Downstream Ports are not permitted to
have a PTM capability; their PTM behavior is controlled by the Upstream
Port (PCIe r5.0, sec 7.9.16). Since Downstream Ports don't have a PTM
capability, we did not mark them as "ptm_enabled", which meant that
pci_enable_ptm() on an Endpoint failed because there was no PTM path to it.
Mark Downstream Ports as "ptm_enabled" if their Upstream Port has PTM
enabled.
Fixes: eec097d43100 ("PCI: Add pci_enable_ptm() for drivers to enable PTM on endpoints")
Reported-by: Aditya Paluri <Venkata.AdityaPaluri@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pcie/err.c')
0 files changed, 0 insertions, 0 deletions