Index: msi.c
===================================================================
--- msi.c       (revision 332419)
+++ msi.c       (working copy)
@@ -404,7 +404,7 @@
        /* Do we need to create some new sources? */
        if (cnt < count) {
                /* If we would exceed the max, give up. */
-               if (i + (count - cnt) > FIRST_MSI_INT + NUM_MSI_INTS) {
+               if (i + (count - cnt) >= FIRST_MSI_INT + NUM_MSI_INTS) {
                        mtx_unlock(&msi_lock);
                        free(mirqs, M_MSI);
                        return (ENXIO);
@@ -645,7 +645,7 @@
        /* Do we need to create a new source? */
        if (msi == NULL) {
                /* If we would exceed the max, give up. */
-               if (i + 1 > FIRST_MSI_INT + NUM_MSI_INTS) {
+               if (i + 1 >= FIRST_MSI_INT + NUM_MSI_INTS) {
                        mtx_unlock(&msi_lock);
                        return (ENXIO);
                }