[PATCH] USB: net2280: send 0-length packets for ep0

This patch (as669) fixes a bug in the net2280 driver.  Now it will
properly send zero-length packets on ep0 until the control status stage
occurs.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 2d5cede..c842b19 100644 (file)
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -2280,9 +2280,7 @@ static void handle_ep_small (struct net2280_ep *ep)
                /* if we wrote it all, we're usually done */
                if (req->req.actual == req->req.length) {
                        if (ep->num == 0) {
-                               /* wait for control status */
-                               if (mode != 2)
-                                       req = NULL;
+                               /* send zlps until the status stage */
                        } else if (!req->req.zero || len != ep->ep.maxpacket)
                                mode = 2;
                }