diff --git a/sys/arm/arm/busdma_machdep-v6.c b/sys/arm/arm/busdma_machdep-v6.c
index 2aff3f8a150..e1c1b81c19d 100644
--- a/sys/arm/arm/busdma_machdep-v6.c
+++ b/sys/arm/arm/busdma_machdep-v6.c
@@ -302,13 +302,14 @@ exclusion_bounce(bus_dma_tag_t dmat)
 }
 
 /*
- * Return true if the given address does not fall on the alignment boundary.
+ * Return true if the given physical address does not fall on the alignment
+ * boundary.
  */
 static __inline int
-alignment_bounce(bus_dma_tag_t dmat, bus_addr_t addr)
+alignment_bounce(bus_dma_tag_t dmat, bus_addr_t paddr)
 {
 
-	return (addr & (dmat->alignment - 1));
+	return (paddr & (dmat->alignment - 1));
 }
 
 /*
@@ -337,18 +338,17 @@ cacheline_bounce(bus_dmamap_t map, bus_addr_t addr, bus_size_t size)
  * This is used to quick-check whether we need to do the more expensive work of
  * checking the DMA page-by-page looking for alignment and exclusion bounces.
  *
- * Note that the addr argument might be either virtual or physical.  It doesn't
- * matter because we only look at the low-order bits, which are the same in both
- * address spaces.
+ * Note that the paddr argument must be physical address because requested
+ * alignment can be bigger that page size.
  */
 static __inline int
-might_bounce(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t addr,
+might_bounce(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t paddr,
     bus_size_t size)
 {
 
 	return ((dmat->flags & BUS_DMA_EXCL_BOUNCE) ||
-	    alignment_bounce(dmat, addr) ||
-	    cacheline_bounce(map, addr, size));
+	    alignment_bounce(dmat, paddr) ||
+	    cacheline_bounce(map, paddr, size));
 }
 
 /*
@@ -1028,7 +1028,7 @@ _bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t buf,
 	counter_u64_add(maploads_total, 1);
 	counter_u64_add(maploads_physmem, 1);
 
-	if (might_bounce(dmat, map, (bus_addr_t)buf, buflen)) {
+	if (might_bounce(dmat, map, pmap_kextract((vm_offset_t)buf), buflen)) {
 		_bus_dmamap_count_phys(dmat, map, buf, buflen, flags);
 		if (map->pagesneeded != 0) {
 			counter_u64_add(maploads_bounced, 1);
@@ -1124,7 +1124,7 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
 		map->flags |= DMAMAP_MBUF;
 	}
 
-	if (might_bounce(dmat, map, (bus_addr_t)buf, buflen)) {
+	if (might_bounce(dmat, map, pmap_kextract((vm_offset_t)buf), buflen)) {
 		_bus_dmamap_count_pages(dmat, pmap, map, buf, buflen, flags);
 		if (map->pagesneeded != 0) {
 			counter_u64_add(maploads_bounced, 1);