1 files changed, 6 insertions, 0 deletions

diff --git a/sys/dev/ahb/ahb.c b/sys/dev/ahb/ahb.c
index a3902aeb0745..2d2d3731d3be 100644
--- a/sys/dev/ahb/ahb.c
+++ b/sys/dev/ahb/ahb.c
@@ -33,6 +33,8 @@
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/module.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
 #include <sys/bus.h>
 
 #include <machine/bus_pio.h>
@@ -303,6 +305,8 @@ ahbattach(device_t dev)
 				/* nsegments	*/ AHB_NSEG,
 				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
 				/* flags	*/ BUS_DMA_ALLOCNOW,
+				/* lockfunc	*/ busdma_lock_mutex,
+				/* lockarg	*/ &Giant,
 				&ahb->buffer_dmat) != 0)
 		goto error_exit;
 
@@ -322,6 +326,8 @@ ahbattach(device_t dev)
 				/* nsegments	*/ 1,
 				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
 				/* flags	*/ 0,
+				/* lockfunc	*/ busdma_lock_mutex,
+				/* lockarg	*/ &Giant,
 				&ahb->ecb_dmat) != 0)
 		goto error_exit;