On 11/6/2023 06:41, Ilpo Järvinen wrote:
On Fri, 3 Nov 2023, Mario Limonciello wrote:
commit 493fb50e958c ("PCI: pciehp: Assume NoCompl+ for Thunderbolt
ports") added a check into pciehp code to explicitly set NoCompl+
for all Intel Thunderbolt controllers, including those that don't
need it.
This overloaded the purpose of the `is_thunderbolt` member of
`struct pci_device` because that means that any controller that
identifies as thunderbolt would set NoCompl+ even if it doesn't
suffer this deficiency. As that commit helpfully specifies all the
controllers with the problem, move them into a PCI quirk.
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
drivers/pci/hotplug/pciehp_hpc.c | 6 +-----
drivers/pci/quirks.c | 20 ++++++++++++++++++++
include/linux/pci.h | 1 +
3 files changed, 22 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index fd713abdfb9f..23a92d681d1c 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -991,11 +991,7 @@ struct controller *pcie_init(struct pcie_device *dev)
if (pdev->hotplug_user_indicators)
slot_cap &= ~(PCI_EXP_SLTCAP_AIP | PCI_EXP_SLTCAP_PIP);
- /*
- * We assume no Thunderbolt controllers support Command Complete events,
- * but some controllers falsely claim they do.
- */
- if (pdev->is_thunderbolt)
+ if (pdev->no_command_complete)
slot_cap |= PCI_EXP_SLTCAP_NCCS;
ctrl->slot_cap = slot_cap;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index eeec1d6f9023..4bbf6e33ca11 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3807,6 +3807,26 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
quirk_thunderbolt_hotplug_msi);
+/*
+ * We assume no Thunderbolt controllers support Command Complete events,
+ * but some controllers falsely claim they do.
IMO, this wording makes little sense with the new code. How about taking
some text from the original commit's changelog:
/*
* Certain Thunderbolt 1 controllers falsely claim to support Command
* Completed events.
*/
The code change looks fine.
Ack, will change.
