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 --- 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 6e0f9bb..2bf4bc0 100644 --- a/drivers/usb/gadget/mv_udc.c +++ b/drivers/usb/gadget/mv_udc.c @@ -362,21 +362,20 @@ 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;