From: Troy Kisky <troy.kisky@boundarydevices.com>
Date: Thu, 26 Sep 2013 01:41:12 +0000 (-0700)
Subject: usb: gadget: mv_udc: flush item before head
X-Git-Tag: v2014.01-rc1~207^2~33
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=5fc2e99732367e7048f8e29592ef2d7aa7d10d14;p=u-boot

usb: gadget: mv_udc: flush item before head

Make sure the transfer descriptor is flushed
before the queue is updated so that the controller
will not see old information.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
---

diff --git a/drivers/usb/gadget/mv_udc.c b/drivers/usb/gadget/mv_udc.c
index 0a19dcebca..c56ccff139 100644
--- a/drivers/usb/gadget/mv_udc.c
+++ b/drivers/usb/gadget/mv_udc.c
@@ -335,21 +335,20 @@ static int mv_ep_queue(struct usb_ep *ep,
 	item->info = INFO_BYTES(len) | INFO_IOC | INFO_ACTIVE;
 	item->page0 = (uint32_t)mv_ep->b_buf;
 	item->page1 = ((uint32_t)mv_ep->b_buf & 0xfffff000) + 0x1000;
+	mv_flush_qtd(num);
 
 	head->next = (unsigned) item;
 	head->info = 0;
 
 	DBG("ept%d %s queue len %x, buffer %p\n",
 	    num, in ? "in" : "out", len, mv_ep->b_buf);
+	mv_flush_qh(num);
 
 	if (in)
 		bit = EPT_TX(num);
 	else
 		bit = EPT_RX(num);
 
-	mv_flush_qh(num);
-	mv_flush_qtd(num);
-
 	writel(bit, &udc->epprime);
 
 	return 0;