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path: root/drivers/usb/gadget/fsl_qe_udc.c
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Diffstat (limited to 'drivers/usb/gadget/fsl_qe_udc.c')
-rw-r--r--drivers/usb/gadget/fsl_qe_udc.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index aee7e3c53c3..36613b37c50 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -1148,6 +1148,12 @@ static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
static int txcomplete(struct qe_ep *ep, unsigned char restart)
{
if (ep->tx_req != NULL) {
+ struct qe_req *req = ep->tx_req;
+ unsigned zlp = 0, last_len = 0;
+
+ last_len = min_t(unsigned, req->req.length - ep->sent,
+ ep->ep.maxpacket);
+
if (!restart) {
int asent = ep->last;
ep->sent += asent;
@@ -1156,9 +1162,18 @@ static int txcomplete(struct qe_ep *ep, unsigned char restart)
ep->last = 0;
}
+ /* zlp needed when req->re.zero is set */
+ if (req->req.zero) {
+ if (last_len == 0 ||
+ (req->req.length % ep->ep.maxpacket) != 0)
+ zlp = 0;
+ else
+ zlp = 1;
+ } else
+ zlp = 0;
+
/* a request already were transmitted completely */
- if ((ep->tx_req->req.length - ep->sent) <= 0) {
- ep->tx_req->req.actual = (unsigned int)ep->sent;
+ if (((ep->tx_req->req.length - ep->sent) <= 0) && !zlp) {
done(ep, ep->tx_req, 0);
ep->tx_req = NULL;
ep->last = 0;
@@ -1191,6 +1206,7 @@ static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame)
buf = (u8 *)ep->tx_req->req.buf + ep->sent;
if (buf && size) {
ep->last = size;
+ ep->tx_req->req.actual += size;
frame_set_data(frame, buf);
frame_set_length(frame, size);
frame_set_status(frame, FRAME_OK);