OpenBSD-5.4 azalia.c workaround for Vortex86EX

$ diff -uNp azalia.c.orig azalia.c
--- azalia.c.orig       Fri Feb 21 21:30:22 2014
+++ azalia.c    Fri Feb 21 21:59:10 2014
@@ -1108,7 +1108,7 @@ azalia_halt_rirb(azalia_t *az)
 int
 azalia_init_rirb(azalia_t *az, int resuming)
 {
-       int err;
+       int err, i;
        uint16_t rirbwp;
        uint8_t rirbctl;

@@ -1159,6 +1159,14 @@ azalia_init_rirb(azalia_t *az, int resuming)
        rirbctl = AZ_READ_1(az, RIRBCTL);
        AZ_WRITE_1(az, RIRBCTL, rirbctl |
            HDA_RIRBCTL_RIRBDMAEN | HDA_RIRBCTL_RINTCTL);
+
+       /* wait for RIRB DMA engine is running */
+       for (i = 1000; i >= 0; i--) {
+               if (AZ_READ_1(az, RIRBCTL) & HDA_RIRBCTL_RIRBDMAEN)
+                       break;
+               DELAY(1);
+       }
+       DPRINTF(("%s: wait counter = %d\n", __func__, i));

        return (0);
 }
$