commit 5c3dc2bbd17016c226e8deb7468f7b3128cc8156
Author: Maxime Ripard <maxime.ripard@free-electrons.com>
Date:   Wed Jun 24 11:03:10 2015 +0200

    musb: sunxi: Force EP0 on re-enable

    Currently, the second use of a gadget will fail, while the first one works.

    Forcing the EP0 at every enable fix this issue.

    Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/drivers/usb/musb-new/sunxi.c b/drivers/usb/musb-new/sunxi.c
index 052e0657d03d..4effaaa3f6ea 100644
--- a/drivers/usb/musb-new/sunxi.c
+++ b/drivers/usb/musb-new/sunxi.c
@@ -203,6 +203,9 @@ static void sunxi_musb_enable(struct musb *musb)
 {
 	pr_debug("%s():\n", __func__);

+	musb_ep_select(musb->mregs, 0);
+	musb_writeb(musb->mregs, MUSB_FADDR, 0);
+
 	if (enabled)
 		return;