--- uart_bus_pci.c      2021-01-16 22:00:06.321333000 +0000	
+++ uart_bus_pci.c      2021-01-16 22:00:06.321333000 +0000	
@@ -228,9 +228,10 @@ 
 
        /*
         * Use MSI in preference to legacy IRQ if available.
-        * Whilst some PCIe UARTs support >1 MSI vector, use only the first.
+        * Whilst some PCIe UARTs support >1 MSI vector, use only support
+        * UARTs using 1.
         */
-       if (pci_msi_count(dev) > 0) {
+       if (pci_msi_count(dev) == 1) {
                count = 1;
                if (pci_alloc_msi(dev, &count) == 0) {
                        sc->sc_irid = 1;