diff options
| -rw-r--r-- | core/pcie-slot.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/core/pcie-slot.c b/core/pcie-slot.c index 711e2e2..fed3462 100644 --- a/core/pcie-slot.c +++ b/core/pcie-slot.c @@ -90,11 +90,15 @@ static int64_t pcie_slot_get_link_state(struct pci_slot *slot, static int64_t pcie_slot_get_power_state(struct pci_slot *slot __unused, uint8_t *val) { - /* The power is always on if no functionality is supported */ - if (!(slot->slot_cap & PCICAP_EXP_SLOTCAP_PWCTRL)) - *val = PCI_SLOT_POWER_ON; - else - *val = slot->power_state; + /* We should return the cached power state that is same to + * the PCI slot hotplug state (added/removed). Otherwise, + * the OS will see mismatched states, causing the adapter + * behind the slot can't be probed successfully on request + * of hot add. So we could run into the situation where the + * OS sees power-off but it's on in hardware. + */ + *val = slot->power_state; + return OPAL_SUCCESS; } |