aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/dwc3
diff options
context:
space:
mode:
authorPratyush Anand <pratyush.anand@st.com>2012-08-30 12:21:43 +0530
committerFelipe Balbi <balbi@ti.com>2012-09-06 19:52:30 +0300
commitf4a53c55117b82e895ec98b1765c9d66940377fc (patch)
treef923ce881bc69fb2ed31a565551f863b280d5baa /drivers/usb/dwc3
parent77975eec149506e457e6abe2ce43259895a9a16e (diff)
usb: dwc3: gadget: fix pending isoc handling
If xfernotready is received and there is no request in request_list then REQUEST_PENDING flag must be set, so that next request in ep queue is executed. In case of isoc transfer, if xfernotready is already elapsed and even first request has not been queued to request_list, then issue END TRANSFER, so that you can receive xfernotready again and can have notion of current microframe. Signed-off-by: Pratyush Anand <pratyush.anand@st.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3')
-rw-r--r--drivers/usb/dwc3/gadget.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index c99568eb429..c2813c2b005 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1029,6 +1029,7 @@ static void __dwc3_gadget_start_isoc(struct dwc3 *dwc,
if (list_empty(&dep->request_list)) {
dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n",
dep->name);
+ dep->flags |= DWC3_EP_PENDING_REQUEST;
return;
}
@@ -1092,6 +1093,17 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
if (dep->flags & DWC3_EP_PENDING_REQUEST) {
int ret;
+ /*
+ * If xfernotready is already elapsed and it is a case
+ * of isoc transfer, then issue END TRANSFER, so that
+ * you can receive xfernotready again and can have
+ * notion of current microframe.
+ */
+ if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
+ dwc3_stop_active_transfer(dwc, dep->number);
+ return 0;
+ }
+
ret = __dwc3_gadget_kick_transfer(dep, 0, true);
if (ret && ret != -EBUSY) {
struct dwc3 *dwc = dep->dwc;