Merge tag 'dma-mapping-4.17' of git://git.infradead.org/users/hch/dma-mapping

[linux] / include / linux / usb / gadget.h

diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index e342423..847f423 100644 (file)
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -806,6 +806,7 @@ int usb_otg_descriptor_init(struct usb_gadget *gadget,
 
 /* utility to simplify map/unmap of usb_requests to/from DMA */
 
+#ifdef CONFIG_HAS_DMA
 extern int usb_gadget_map_request_by_dev(struct device *dev,
                struct usb_request *req, int is_in);
 extern int usb_gadget_map_request(struct usb_gadget *gadget,
@@ -815,6 +816,17 @@ extern void usb_gadget_unmap_request_by_dev(struct device *dev,
                struct usb_request *req, int is_in);
 extern void usb_gadget_unmap_request(struct usb_gadget *gadget,
                struct usb_request *req, int is_in);
+#else /* !CONFIG_HAS_DMA */
+static inline int usb_gadget_map_request_by_dev(struct device *dev,
+               struct usb_request *req, int is_in) { return -ENOSYS; }
+static inline int usb_gadget_map_request(struct usb_gadget *gadget,
+               struct usb_request *req, int is_in) { return -ENOSYS; }
+
+static inline void usb_gadget_unmap_request_by_dev(struct device *dev,
+               struct usb_request *req, int is_in) { }
+static inline void usb_gadget_unmap_request(struct usb_gadget *gadget,
+               struct usb_request *req, int is_in) { }
+#endif /* !CONFIG_HAS_DMA */
 
 /*-------------------------------------------------------------------------*/