diff --git a/sys/dev/advansys/adv_pci.c b/sys/dev/advansys/adv_pci.c
index 6a073ba68db0..ef938e38efeb 100644
--- a/sys/dev/advansys/adv_pci.c
+++ b/sys/dev/advansys/adv_pci.c
@@ -189,7 +189,7 @@ adv_pci_attach(device_t dev)
 	/* Allocate a dmatag for our transfer DMA maps */
 	/* XXX Should be a child of the PCI bus dma tag */
 	error = bus_dma_tag_create(
-			/* parent	*/ NULL,
+			/* parent	*/ bus_get_dma_tag(dev),
 			/* alignment	*/ 1,
 			/* boundary	*/ 0,
 			/* lowaddr	*/ ADV_PCI_MAX_DMA_ADDR,
diff --git a/sys/dev/advansys/adw_pci.c b/sys/dev/advansys/adw_pci.c
index 8777a4428abc..d9169cf70a04 100644
--- a/sys/dev/advansys/adw_pci.c
+++ b/sys/dev/advansys/adw_pci.c
@@ -260,7 +260,7 @@ adw_pci_attach(device_t dev)
 	/* Allocate a dmatag for our transfer DMA maps */
 	/* XXX Should be a child of the PCI bus dma tag */
 	error = bus_dma_tag_create(
-			/* parent	*/ NULL,
+			/* parent	*/ bus_get_dma_tag(dev),
 			/* alignment	*/ 1,
 			/* boundary	*/ 0,
 			/* lowaddr	*/ ADW_PCI_MAX_DMA_ADDR,
diff --git a/sys/dev/amr/amr_pci.c b/sys/dev/amr/amr_pci.c
index 61b20e17e350..f47d408764db 100644
--- a/sys/dev/amr/amr_pci.c
+++ b/sys/dev/amr/amr_pci.c
@@ -275,7 +275,7 @@ amr_pci_attach(device_t dev)
     /*
      * Allocate the parent bus DMA tag appropriate for PCI.
      */
-    if (bus_dma_tag_create(NULL, 			/* parent */
+    if (bus_dma_tag_create(bus_get_dma_tag(dev),	/* PCI parent */
 			   1, 0, 			/* alignment,boundary */
 			   AMR_IS_SG64(sc) ?
 			   BUS_SPACE_MAXADDR :
diff --git a/sys/dev/an/if_an_pci.c b/sys/dev/an/if_an_pci.c
index 2d0d2b5a6672..fe3467d83e07 100644
--- a/sys/dev/an/if_an_pci.c
+++ b/sys/dev/an/if_an_pci.c
@@ -195,7 +195,7 @@ an_attach_pci(dev)
 		}
 
 		/* Allocate DMA region */
-		error = bus_dma_tag_create(NULL,	/* parent */
+		error = bus_dma_tag_create(bus_get_dma_tag(dev),/* parent */
 			       1, 0,			/* alignment, bounds */
 			       BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
 			       BUS_SPACE_MAXADDR,	/* highaddr */
diff --git a/sys/dev/arcmsr/arcmsr.c b/sys/dev/arcmsr/arcmsr.c
index ee2e538ad0fe..a24809ed162c 100644
--- a/sys/dev/arcmsr/arcmsr.c
+++ b/sys/dev/arcmsr/arcmsr.c
@@ -3486,7 +3486,7 @@ static u_int32_t arcmsr_initialize(device_t dev)
 			return ENOMEM;
 		}
 	}
-	if(bus_dma_tag_create(  /*parent*/		NULL,
+	if(bus_dma_tag_create(  /*PCI parent*/		bus_get_dma_tag(dev),
 							/*alignemnt*/	1,
 							/*boundary*/	0,
 							/*lowaddr*/		BUS_SPACE_MAXADDR,
diff --git a/sys/dev/asr/asr.c b/sys/dev/asr/asr.c
index 6034b6f239bf..127ade2555eb 100644
--- a/sys/dev/asr/asr.c
+++ b/sys/dev/asr/asr.c
@@ -2328,7 +2328,7 @@ asr_alloc_dma(Asr_softc_t *sc)
 
 	dev = sc->ha_dev;
 
-	if (bus_dma_tag_create(NULL,			/* parent */
+	if (bus_dma_tag_create(bus_get_dma_tag(dev),	/* PCI parent */
 			       1, 0,			/* algnmnt, boundary */
 			       BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
 			       BUS_SPACE_MAXADDR,	/* highaddr */
diff --git a/sys/dev/buslogic/bt_pci.c b/sys/dev/buslogic/bt_pci.c
index de7cc9ed4e8b..5994bec2119c 100644
--- a/sys/dev/buslogic/bt_pci.c
+++ b/sys/dev/buslogic/bt_pci.c
@@ -173,7 +173,7 @@ bt_pci_attach(device_t dev)
 
 	/* Allocate a dmatag for our CCB DMA maps */
 	/* XXX Should be a child of the PCI bus dma tag */
-	if (bus_dma_tag_create(	/* parent	*/ NULL,
+	if (bus_dma_tag_create(	/* PCI parent	*/ bus_get_dma_tag(dev),
 				/* alignemnt	*/ 1,
 				/* boundary	*/ 0,
 				/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
diff --git a/sys/dev/bxe/if_bxe.c b/sys/dev/bxe/if_bxe.c
index 1c5398acbb91..b60d6e2fc78c 100644
--- a/sys/dev/bxe/if_bxe.c
+++ b/sys/dev/bxe/if_bxe.c
@@ -13582,7 +13582,8 @@ bxe_host_structures_alloc(device_t dev)
 	/*
 	 * Allocate the parent bus DMA tag appropriate for PCI.
 	 */
-	rc = bus_dma_tag_create(NULL,	/* parent tag */
+	rc = bus_dma_tag_create(
+	    bus_get_dma_tag(dev),	/* PCI parent tag */
 	    1,				/* alignment for segs */
 	    BXE_DMA_BOUNDARY,		/* cannot cross */
 	    BUS_SPACE_MAXADDR,		/* restricted low */
diff --git a/sys/dev/ciss/ciss.c b/sys/dev/ciss/ciss.c
index 37af5168cfe4..3291f03e44dd 100644
--- a/sys/dev/ciss/ciss.c
+++ b/sys/dev/ciss/ciss.c
@@ -796,7 +796,7 @@ ciss_init_pci(struct ciss_softc *sc)
      * Note that "simple" adapters can only address within a 32-bit
      * span.
      */
-    if (bus_dma_tag_create(NULL, 			/* parent */
+    if (bus_dma_tag_create(bus_get_dma_tag(sc->ciss_dev),/* PCI parent */
 			   1, 0, 			/* alignment, boundary */
 			   BUS_SPACE_MAXADDR,		/* lowaddr */
 			   BUS_SPACE_MAXADDR, 		/* highaddr */
diff --git a/sys/dev/cxgb/cxgb_sge.c b/sys/dev/cxgb/cxgb_sge.c
index a34dab28b5da..5450b7ef6b53 100644
--- a/sys/dev/cxgb/cxgb_sge.c
+++ b/sys/dev/cxgb/cxgb_sge.c
@@ -592,7 +592,7 @@ t3_sge_alloc(adapter_t *sc)
 {
 
 	/* The parent tag. */
-	if (bus_dma_tag_create( NULL,			/* parent */
+	if (bus_dma_tag_create( bus_get_dma_tag(sc->dev),/* PCI parent */
 				1, 0,			/* algnmnt, boundary */
 				BUS_SPACE_MAXADDR,	/* lowaddr */
 				BUS_SPACE_MAXADDR,	/* highaddr */
diff --git a/sys/dev/dpt/dpt_pci.c b/sys/dev/dpt/dpt_pci.c
index df925659e758..2009dbdf2f20 100644
--- a/sys/dev/dpt/dpt_pci.c
+++ b/sys/dev/dpt/dpt_pci.c
@@ -133,7 +133,7 @@ dpt_pci_attach (device_t dev)
 
 	/* Allocate a dmatag representing the capabilities of this attachment */
 	/* XXX Should be a child of the PCI bus dma tag */
-	if (bus_dma_tag_create(	/* parent    */	NULL,
+	if (bus_dma_tag_create(	/* PCI parent */ bus_get_dma_tag(dev),
 				/* alignemnt */	1,
 				/* boundary  */	0,
 				/* lowaddr   */	BUS_SPACE_MAXADDR_32BIT,
diff --git a/sys/dev/hifn/hifn7751.c b/sys/dev/hifn/hifn7751.c
index 7e3a65f7931c..ecb12397cda9 100644
--- a/sys/dev/hifn/hifn7751.c
+++ b/sys/dev/hifn/hifn7751.c
@@ -431,7 +431,7 @@ hifn_attach(device_t dev)
 	 * Setup the area where the Hifn DMA's descriptors
 	 * and associated data structures.
 	 */
-	if (bus_dma_tag_create(NULL,			/* parent */
+	if (bus_dma_tag_create(bus_get_dma_tag(dev),	/* PCI parent */
 			       1, 0,			/* alignment,boundary */
 			       BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
 			       BUS_SPACE_MAXADDR,	/* highaddr */
diff --git a/sys/dev/hptiop/hptiop.c b/sys/dev/hptiop/hptiop.c
index 035cf07a0492..188ab8097572 100644
--- a/sys/dev/hptiop/hptiop.c
+++ b/sys/dev/hptiop/hptiop.c
@@ -1358,7 +1358,7 @@ static int hptiop_attach(device_t dev)
 	mtx_init(&hba->lock, "hptioplock", NULL, MTX_DEF);
 #endif
 
-	if (bus_dma_tag_create(NULL,/* parent */
+	if (bus_dma_tag_create(bus_get_dma_tag(dev),/* PCI parent */
 			1,  /* alignment */
 			0, /* boundary */
 			BUS_SPACE_MAXADDR,  /* lowaddr */
diff --git a/sys/dev/hptmv/entry.c b/sys/dev/hptmv/entry.c
index 4c61e655898c..f525b1f98fed 100644
--- a/sys/dev/hptmv/entry.c
+++ b/sys/dev/hptmv/entry.c
@@ -1326,7 +1326,7 @@ init_adapter(IAL_ADAPTER_T *pAdapter)
 	_vbus_p->OsExt = (void *)pAdapter; 
 	pMvSataAdapter->IALData = pAdapter;
 
-	if (bus_dma_tag_create(NULL,/* parent */
+	if (bus_dma_tag_create(bus_get_dma_tag(pAdapter->hpt_dev),/* parent */
 			4,	/* alignment */
 			BUS_SPACE_MAXADDR_32BIT+1, /* boundary */
 			BUS_SPACE_MAXADDR,	/* lowaddr */
diff --git a/sys/dev/ida/ida_pci.c b/sys/dev/ida/ida_pci.c
index e71c6d4be897..bb6088f24161 100644
--- a/sys/dev/ida/ida_pci.c
+++ b/sys/dev/ida/ida_pci.c
@@ -267,7 +267,7 @@ ida_pci_attach(device_t dev)
 	}
 
 	error = bus_dma_tag_create(
-		/* parent	*/ NULL,
+		/* parent	*/ bus_get_dma_tag(dev),
 		/* alignment	*/ 1,
 		/* boundary	*/ 0,
 		/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
diff --git a/sys/dev/if_ndis/if_ndis_pci.c b/sys/dev/if_ndis/if_ndis_pci.c
index 2b9ad1ef3993..a71b5da92554 100644
--- a/sys/dev/if_ndis/if_ndis_pci.c
+++ b/sys/dev/if_ndis/if_ndis_pci.c
@@ -290,7 +290,7 @@ ndis_attach_pci(dev)
 	 * Allocate the parent bus DMA tag appropriate for PCI.
 	 */
 #define NDIS_NSEG_NEW 32
-	error = bus_dma_tag_create(NULL,	/* parent */
+	error = bus_dma_tag_create(bus_get_dma_tag(dev),/* PCI parent */
 			1, 0,			/* alignment, boundary */
 			BUS_SPACE_MAXADDR_32BIT,/* lowaddr */
                         BUS_SPACE_MAXADDR,	/* highaddr */
diff --git a/sys/dev/iir/iir_pci.c b/sys/dev/iir/iir_pci.c
index 19d09c619fd8..662f06bc3b2f 100644
--- a/sys/dev/iir/iir_pci.c
+++ b/sys/dev/iir/iir_pci.c
@@ -318,7 +318,8 @@ iir_pci_attach(device_t dev)
 
     /* Allocate a dmatag representing the capabilities of this attachment */
     /* XXX Should be a child of the PCI bus dma tag */
-    if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
+    if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev),
+                           /*alignemnt*/1, /*boundary*/0,
                            /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
                            /*highaddr*/BUS_SPACE_MAXADDR,
                            /*filter*/NULL, /*filterarg*/NULL,
diff --git a/sys/dev/ips/ips_pci.c b/sys/dev/ips/ips_pci.c
index 9781087891d1..d39f4acbf65c 100644
--- a/sys/dev/ips/ips_pci.c
+++ b/sys/dev/ips/ips_pci.c
@@ -135,7 +135,7 @@ static int ips_pci_attach(device_t dev)
                 device_printf(dev, "irq setup failed\n");
                 goto error;
         }
-	if (bus_dma_tag_create(	/* parent    */	NULL,
+	if (bus_dma_tag_create(	/* PCI parent */bus_get_dma_tag(dev),
 				/* alignemnt */	1,
 				/* boundary  */	0,
 				/* lowaddr   */	BUS_SPACE_MAXADDR_32BIT,
diff --git a/sys/dev/mfi/mfi_pci.c b/sys/dev/mfi/mfi_pci.c
index 952ab1a3f467..30db74bd5967 100644
--- a/sys/dev/mfi/mfi_pci.c
+++ b/sys/dev/mfi/mfi_pci.c
@@ -216,7 +216,7 @@ mfi_pci_attach(device_t dev)
 	error = ENOMEM;
 
 	/* Allocate parent DMA tag */
-	if (bus_dma_tag_create(	NULL,			/* parent */
+	if (bus_dma_tag_create(	bus_get_dma_tag(dev),	/* PCI parent */
 				1, 0,			/* algnmnt, boundary */
 				BUS_SPACE_MAXADDR,	/* lowaddr */
 				BUS_SPACE_MAXADDR,	/* highaddr */
diff --git a/sys/dev/mlx/mlx_pci.c b/sys/dev/mlx/mlx_pci.c
index 00d0fe2bac0f..92ad8781a653 100644
--- a/sys/dev/mlx/mlx_pci.c
+++ b/sys/dev/mlx/mlx_pci.c
@@ -189,7 +189,7 @@ mlx_pci_attach(device_t dev)
     /*
      * Allocate the parent bus DMA tag appropriate for PCI.
      */
-    error = bus_dma_tag_create(NULL, 			/* parent */
+    error = bus_dma_tag_create(bus_get_dma_tag(dev),	/* PCI parent */
 			       1, 0, 			/* alignment, boundary */
 			       BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
 			       BUS_SPACE_MAXADDR, 	/* highaddr */
diff --git a/sys/dev/mly/mly.c b/sys/dev/mly/mly.c
index ee73ae9b9736..826b89dd48d6 100644
--- a/sys/dev/mly/mly.c
+++ b/sys/dev/mly/mly.c
@@ -392,7 +392,7 @@ mly_pci_attach(struct mly_softc *sc)
      * 
      * Note that all of these controllers are 64-bit capable.
      */
-    if (bus_dma_tag_create(NULL, 			/* parent */
+    if (bus_dma_tag_create(bus_get_dma_tag(sc->mly_dev),/* PCI parent */
 			   1, 0, 			/* alignment, boundary */
 			   BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
 			   BUS_SPACE_MAXADDR, 		/* highaddr */
diff --git a/sys/dev/twe/twe_freebsd.c b/sys/dev/twe/twe_freebsd.c
index 29dab580d9dc..6c31d6a07940 100644
--- a/sys/dev/twe/twe_freebsd.c
+++ b/sys/dev/twe/twe_freebsd.c
@@ -225,7 +225,7 @@ twe_attach(device_t dev)
     /*
      * Allocate the parent bus DMA tag appropriate for PCI.
      */
-    if (bus_dma_tag_create(NULL, 				/* parent */
+    if (bus_dma_tag_create(bus_get_dma_tag(dev),		/* PCI parent */
 			   1, 0, 				/* alignment, boundary */
 			   BUS_SPACE_MAXADDR_32BIT, 		/* lowaddr */
 			   BUS_SPACE_MAXADDR, 			/* highaddr */
diff --git a/sys/dev/tws/tws.c b/sys/dev/tws/tws.c
index ba3b1505a42b..b1615db07d26 100644
--- a/sys/dev/tws/tws.c
+++ b/sys/dev/tws/tws.c
@@ -521,7 +521,7 @@ tws_init(struct tws_softc *sc)
                                  TWS_MAX_32BIT_SG_ELEMENTS;
     dma_mem_size = (sizeof(struct tws_command_packet) * tws_queue_depth) +
                              (TWS_SECTOR_SIZE) ;
-    if ( bus_dma_tag_create(NULL,                    /* parent */          
+    if ( bus_dma_tag_create(bus_get_dma_tag(sc->tws_dev), /* PCI parent */ 
                             TWS_ALIGNMENT,           /* alignment */
                             0,                       /* boundary */
                             BUS_SPACE_MAXADDR_32BIT, /* lowaddr */