diff --git a/MAINTAINERS b/MAINTAINERS
index 45d48cd38904..89007f9ed35e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20108,9 +20108,8 @@ F:	Documentation/devicetree/bindings/pci/marvell,armada-3700-pcie.yaml
 F:	drivers/pci/controller/pci-aardvark.c
 
 PCI DRIVER FOR ALTERA PCIE IP
-M:	Joyce Ooi <joyce.ooi@intel.com>
 L:	linux-pci@vger.kernel.org
-S:	Supported
+S:	Orphan
 F:	Documentation/devicetree/bindings/pci/altr,pcie-root-port.yaml
 F:	drivers/pci/controller/pcie-altera.c
 
@@ -20355,9 +20354,8 @@ S:	Supported
 F:	Documentation/PCI/pci-error-recovery.rst
 
 PCI MSI DRIVER FOR ALTERA MSI IP
-M:	Joyce Ooi <joyce.ooi@intel.com>
 L:	linux-pci@vger.kernel.org
-S:	Supported
+S:	Orphan
 F:	Documentation/devicetree/bindings/interrupt-controller/altr,msi-controller.yaml
 F:	drivers/pci/controller/pcie-altera-msi.c
 
diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
index 756043dd06e9..fb9fbf0d1796 100644
--- a/arch/powerpc/kernel/pci_of_scan.c
+++ b/arch/powerpc/kernel/pci_of_scan.c
@@ -212,6 +212,13 @@ struct pci_dev *of_create_pci_dev(struct device_node *node,
 	dev->error_state = pci_channel_io_normal;
 	dev->dma_mask = 0xffffffff;
 
+	/*
+	 * Assume 64-bit addresses for MSI initially. Will be changed to 32-bit
+	 * if MSI (rather than MSI-X) capability does not have
+	 * PCI_MSI_FLAGS_64BIT. Can also be overridden by driver.
+	 */
+	dev->msi_addr_mask = DMA_BIT_MASK(64);
+
 	/* Early fixups, before probing the BARs */
 	pci_fixup_device(pci_fixup_early, dev);
 
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 7e41574634b3..1603d50fdcad 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -355,6 +355,13 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 	dev->error_state = pci_channel_io_normal;
 	dev->dma_mask = 0xffffffff;
 
+	/*
+	 * Assume 64-bit addresses for MSI initially. Will be changed to 32-bit
+	 * if MSI (rather than MSI-X) capability does not have
+	 * PCI_MSI_FLAGS_64BIT. Can also be overridden by driver.
+	 */
+	dev->msi_addr_mask = DMA_BIT_MASK(64);
+
 	if (of_node_name_eq(node, "pci")) {
 		/* a PCI-PCI bridge */
 		dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;