usb: musb: gadget: fix to_musb_request() to not return NULL

The gadget function drivers should ensure the usb_request parameter
passed in is not NULL. UDC core doesn't check if it is NULL, so MUSB
driver shouldn't have to check it either.

Convert to_musb_request() to a simple macro to not directly return NULL
to avoid warnings from code static analysis tools.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/musb/musb_gadget.h b/drivers/usb/musb/musb_gadget.h
index 9c34aca06db6da9857070634f3f522d52047e3a2..06d60848337fb54bd405ae2d7468e94f45e58c07 100644 (file)
--- a/drivers/usb/musb/musb_gadget.h
+++ b/drivers/usb/musb/musb_gadget.h
@@ -60,10 +60,7 @@ struct musb_request {
        enum buffer_map_state map_state;
 };
 
-static inline struct musb_request *to_musb_request(struct usb_request *req)
-{
-       return req ? container_of(req, struct musb_request, request) : NULL;
-}
+#define to_musb_request(r)     container_of((r), struct musb_request, request)
 
 extern struct usb_request *
 musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);