usb: gadget: protect gadget_chips.h from been included twice

Without it, we might have trouble when trying to write
some composite gadget drivers.

Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h
index 5246e8fef2b2..17d9905101b7 100644
--- a/drivers/usb/gadget/gadget_chips.h
+++ b/drivers/usb/gadget/gadget_chips.h
@@ -11,6 +11,10 @@
  * Some are available on 2.4 kernels; several are available, but not
  * yet pushed in the 2.6 mainline tree.
  */
+
+#ifndef __GADGET_CHIPS_H
+#define __GADGET_CHIPS_H
+
 #ifdef CONFIG_USB_GADGET_NET2280
 #define gadget_is_net2280(g)    !strcmp("net2280", (g)->name)
 #else
@@ -237,3 +241,5 @@ static inline bool gadget_supports_altsettings(struct usb_gadget *gadget)
         /* Everything else is *presumably* fine ... */
         return true;
 }
+
+#endif /* __GADGET_CHIPS_H */