Index: sys/dev/ahci/ahci.c
===================================================================
--- sys/dev/ahci/ahci.c
+++ sys/dev/ahci/ahci.c
@@ -987,7 +987,7 @@
 	if (bus_dma_tag_create(bus_get_dma_tag(dev), 1024, 0,
 	    BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
 	    NULL, NULL, AHCI_WORK_SIZE, 1, AHCI_WORK_SIZE,
-	    0, NULL, NULL, &ch->dma.work_tag))
+	    0, busdma_lock_mutex, &ch->mtx, &ch->dma.work_tag))
 		goto error;
 	if (bus_dmamem_alloc(ch->dma.work_tag, (void **)&ch->dma.work,
 	    BUS_DMA_ZERO, &ch->dma.work_map))
@@ -1006,7 +1006,7 @@
 	if (bus_dma_tag_create(bus_get_dma_tag(dev), rfsize, 0,
 	    BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
 	    NULL, NULL, rfsize, 1, rfsize,
-	    0, NULL, NULL, &ch->dma.rfis_tag))
+	    0, busdma_lock_mutex, &ch->mtx, &ch->dma.rfis_tag))
 		goto error;
 	if (bus_dmamem_alloc(ch->dma.rfis_tag, (void **)&ch->dma.rfis, 0,
 	    &ch->dma.rfis_map))