From: Stephen Warren swarren@nvidia.com
Fix ci_ep_submit_next_request()'s ZLP transmission code to explicitly call ci_get_qtd() to find the address of the other QTD to use. This will allow us to correctly align each QTD individually in the future, which may involve leaving a gap between the QTDs.
Signed-off-by: Stephen Warren swarren@nvidia.com --- drivers/usb/gadget/ci_udc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/gadget/ci_udc.c b/drivers/usb/gadget/ci_udc.c index 8ba604841c47..4115cd5dab0f 100644 --- a/drivers/usb/gadget/ci_udc.c +++ b/drivers/usb/gadget/ci_udc.c @@ -404,10 +404,11 @@ static void ci_ep_submit_next_request(struct ci_ep *ci_ep) * only 1 is used at a time since either an IN or an OUT but * not both is queued. For an IN transaction, item currently * points at the second of these items, so we know that we - * can use (item - 1) to transmit the extra zero-length packet + * can use the other to transmit the extra zero-length packet. */ - item->next = (unsigned)(item - 1); - item--; + struct ept_queue_item *other_item = ci_get_qtd(num, 0); + item->next = (unsigned)other_item; + item = other_item; item->info = INFO_ACTIVE; }