usb: gadget: Clear usb_endpoint_descriptor inside the struct usb_ep on disable

This fix a bug in f_serial, which expect the ep->desc to be NULL after
disabling an endpoint.

Cc: stable@vger.kernel.org
Signed-off-by: Ido Shayevitz <idos@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index 3f87cb9344bb..ab9c65e2c1d5 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1148,6 +1148,7 @@ static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
 
         ep->desc = NULL;
+        ep->ep.desc = NULL;
         ep->halted = 1;
 
         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
@@ -1630,6 +1631,7 @@ static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
 
                 ep->dev = dev;
                 ep->desc = NULL;
+                ep->ep.desc = NULL;
                 ep->halted = 0;
                 INIT_LIST_HEAD (&ep->queue);
         }