Merge branch 'remotes/lorenzo/pci/msi'

- Convert tegra to MSI domains (Marc Zyngier)

- Use rcar controller address as MSI doorbell instead of allocating a page
  (Marc Zyngier)

- Convert rcar to MSI domains (Marc Zyngier)

- Use xilinx port structure as MSI doorbell instead of allocating a page
  (Marc Zyngier)

- Convert xilinx to MSI domains (Marc Zyngier)

- Remove unused Hyper-V msi_controller structure (Marc Zyngier)

- Remove unused PCI core msi_controller support (Marc Zyngier)

- Remove struct msi_controller (Marc Zyngier)

- Remove unused default_teardown_msi_irqs() (Marc Zyngier)

- Let host bridges declare their reliance on MSI domains (Marc Zyngier)

- Make pci_host_common_probe() declare its reliance on MSI domains (Marc
  Zyngier)

- Advertise mediatek lack of built-in MSI handling (Thomas Gleixner)

- Document ways of ending up with NO_MSI (Marc Zyngier)

- Refactor HT advertising of NO_MSI flag (Marc Zyngier)

* remotes/lorenzo/pci/msi:
  PCI: Refactor HT advertising of NO_MSI flag
  PCI/MSI: Document the various ways of ending up with NO_MSI
  PCI: mediatek: Advertise lack of built-in MSI handling
  PCI/MSI: Make pci_host_common_probe() declare its reliance on MSI domains
  PCI/MSI: Let PCI host bridges declare their reliance on MSI domains
  PCI/MSI: Kill default_teardown_msi_irqs()
  PCI/MSI: Kill msi_controller structure
  PCI/MSI: Drop use of msi_controller from core code
  PCI: hv: Drop msi_controller structure
  PCI: xilinx: Convert to MSI domains
  PCI: xilinx: Don't allocate extra memory for the MSI capture address
  PCI: rcar: Convert to MSI domains
  PCI: rcar: Don't allocate extra memory for the MSI capture address
  PCI: tegra: Convert to MSI domains

1 files changed, 4 insertions, 11 deletions

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index af43b340853ee..dcb229de1acb7 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2580,10 +2580,8 @@ static int msi_ht_cap_enabled(struct pci_dev *dev)
 /* Check the HyperTransport MSI mapping to know whether MSI is enabled or not */
 static void quirk_msi_ht_cap(struct pci_dev *dev)
 {
-	if (dev->subordinate && !msi_ht_cap_enabled(dev)) {
-		pci_warn(dev, "MSI quirk detected; subordinate MSI disabled\n");
-		dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
-	}
+	if (!msi_ht_cap_enabled(dev))
+		quirk_disable_msi(dev);
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE,
 			quirk_msi_ht_cap);
@@ -2596,9 +2594,6 @@ static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev)
 {
 	struct pci_dev *pdev;
 
-	if (!dev->subordinate)
-		return;
-
 	/*
 	 * Check HT MSI cap on this chipset and the root one.  A single one
 	 * having MSI is enough to be sure that MSI is supported.
@@ -2606,10 +2601,8 @@ static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev)
 	pdev = pci_get_slot(dev->bus, 0);
 	if (!pdev)
 		return;
-	if (!msi_ht_cap_enabled(dev) && !msi_ht_cap_enabled(pdev)) {
-		pci_warn(dev, "MSI quirk detected; subordinate MSI disabled\n");
-		dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
-	}
+	if (!msi_ht_cap_enabled(pdev))
+		quirk_msi_ht_cap(dev);
 	pci_dev_put(pdev);
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE,