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authorGeert Uytterhoeven <geert@linux-m68k.org>2018-03-16 14:25:42 +0100
committerChristoph Hellwig <hch@lst.de>2018-03-16 19:58:28 +0100
commit1f674e16f9ce6eb20ee2e81ae7514737376874de (patch)
tree3f0e03e6e8c98f651dca0c73bfd3af83cd8e8fc2 /include/linux/usb/gadget.h
parentbff739b6559e2fcec37cd0465c7aa37663f4baeb (diff)
usb: gadget: Add NO_DMA dummies for DMA mapping API
Add dummies for usb_gadget_{,un}map_request{,_by_dev}(), to allow compile-testing if NO_DMA=y. This prevents the following from showing up later: ERROR: "usb_gadget_unmap_request_by_dev" [drivers/usb/renesas_usbhs/renesas_usbhs.ko] undefined! ERROR: "usb_gadget_map_request_by_dev" [drivers/usb/renesas_usbhs/renesas_usbhs.ko] undefined! ERROR: "usb_gadget_map_request" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "usb_gadget_unmap_request" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "usb_gadget_map_request" [drivers/usb/gadget/udc/renesas_usb3.ko] undefined! ERROR: "usb_gadget_unmap_request" [drivers/usb/gadget/udc/renesas_usb3.ko] undefined! Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Mark Brown <broonie@kernel.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/usb/gadget.h')
-rw-r--r--include/linux/usb/gadget.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 66a5cff7ee14..b68e7f9b210b 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -805,6 +805,7 @@ 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,
@@ -814,6 +815,17 @@ 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 */
/*-------------------------------------------------------------------------*/