[U-Boot] [PATCH V4 11/17] usb: gadget: mv_udc: flush item before head

Troy Kisky
2013-09-20T03:29:34Z

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>

---
v4: no change
---
drivers/usb/gadget/mv_udc.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/gadget/mv_udc.c b/drivers/usb/gadget/mv_udc.c
index 97bab93..075b039 100644
--- a/drivers/usb/gadget/mv_udc.c
+++ b/drivers/usb/gadget/mv_udc.c
@@ -347,21 +347,20 @@ 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;
--
1.8.1.2