usb: gadget: add usb_endpoint_descriptor to struct usb_ep

Change usb_ep_enable() prototype to use endpoint
descriptor from usb_ep.

This optimization spares the FDs from saving the
endpoint chosen descriptor. This optimization is
not full though. To fully exploit this change, one
needs to update all the UDCs as well since in the
current implementation each of them saves the
endpoint descriptor in it's internal (and extended)
endpoint structure.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 83bee30cdb94..738591a64bb4 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -2713,7 +2713,8 @@ static int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep,
         int     rc;
 
         ep->driver_data = fsg;
-        rc = usb_ep_enable(ep, d);
+        ep->desc = d;
+        rc = usb_ep_enable(ep);
         if (rc)
                 ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc);
         return rc;