Index: pci.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/pci.c,v
retrieving revision 1.115
diff -u -p -r1.115 pci.c
--- pci.c	15 Jan 2020 14:01:19 -0000	1.115
+++ pci.c	17 Jun 2020 01:16:18 -0000
@@ -1625,7 +1656,18 @@ pci_resume_msix(pci_chipset_tag_t pc, pc
 	pci_conf_write(pc, tag, off, mc);
 }
 
-#else
+int
+pci_intr_msix_count(pci_chipset_tag_t pc, pcitag_t tag)
+{
+	pcireg_t reg;
+
+	if (pci_get_capability(pc, tag, PCI_CAP_MSIX, NULL, &reg) == 0)
+		return (0);
+
+	return (PCI_MSIX_MC_TBLSZ(reg));
+}
+
+#else /* __HAVE_PCI_MSIX */
 
 struct msix_vector *
 pci_alloc_msix_table(pci_chipset_tag_t pc, pcitag_t tag)
@@ -1649,6 +1691,12 @@ void
 pci_resume_msix(pci_chipset_tag_t pc, pcitag_t tag,
     bus_space_tag_t memt, pcireg_t mc, struct msix_vector *table)
 {
+}
+
+int
+pci_intr_msix_count(pci_chipset_tag_t pc, pcitag_t tag)
+{
+	return (0);
 }
 
 #endif /* __HAVE_PCI_MSIX */
Index: pcivar.h
===================================================================
RCS file: /cvs/src/sys/dev/pci/pcivar.h,v
retrieving revision 1.72
diff -u -p -r1.72 pcivar.h
--- pcivar.h	25 Jun 2019 16:46:33 -0000	1.72
+++ pcivar.h	17 Jun 2020 01:16:18 -0000
@@ -247,6 +247,8 @@ void	pci_suspend_msix(pci_chipset_tag_t,
 void	pci_resume_msix(pci_chipset_tag_t, pcitag_t, bus_space_tag_t,
 	    pcireg_t, struct msix_vector *);
 
+int	pci_intr_msix_count(pci_chipset_tag_t, pcitag_t);
+
 uint16_t pci_requester_id(pci_chipset_tag_t, pcitag_t);
 
 struct pci_matchid {