2 files changed, 6 insertions, 3 deletions

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 2102c4deec1e..0cc14206920a 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1152,7 +1152,7 @@ doit:
         /* lower level hcd code should use *_dma exclusively,
          * unless it uses pio or talks to another transport.
          */
-        if (hcd->self.controller->dma_mask) {
+        if (hcd->self.uses_dma) {
                 if (usb_pipecontrol (urb->pipe)
                         && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP))
                         urb->setup_dma = dma_map_single (
@@ -1585,8 +1585,9 @@ void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb, struct pt_regs
         at_root_hub = (urb->dev == hcd->self.root_hub);
         urb_unlink (urb);
 
-        /* lower level hcd code should use *_dma exclusively */
-        if (hcd->self.controller->dma_mask && !at_root_hub) {
+        /* lower level hcd code should use *_dma exclusively if the
+         * host controller does DMA */
+        if (hcd->self.uses_dma && !at_root_hub) {
                 if (usb_pipecontrol (urb->pipe)
                         && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP))
                         dma_unmap_single (hcd->self.controller, urb->setup_dma,
@@ -1710,6 +1711,7 @@ struct usb_hcd *usb_create_hcd (const struct hc_driver *driver,
         hcd->self.release = &hcd_release;
         hcd->self.controller = dev;
         hcd->self.bus_name = bus_name;
+        hcd->self.uses_dma = (dev->dma_mask != NULL);
 
         init_timer(&hcd->rh_timer);
         hcd->rh_timer.function = rh_timer_func;
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 4709033f8fa7..09661759621f 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -269,6 +269,7 @@ struct usb_bus {
         struct device *controller;      /* host/master side hardware */
         int busnum;                     /* Bus number (in order of reg) */
         char *bus_name;                 /* stable id (PCI slot_name etc) */
+        u8 uses_dma;                    /* Does the host controller use DMA? */
         u8 otg_port;                    /* 0, or number of OTG/HNP port */
         unsigned is_b_host:1;           /* true during some HNP roleswitches */
         unsigned b_hnp_enable:1;        /* OTG: did A-Host enable HNP? */