diff mbox series

[v5,3/3] usb: dwc3: gadget: when the started list is empty stop the active xfer

Message ID 20200701182453.25299-4-m.grzeschik@pengutronix.de (mailing list archive)
State Mainlined
Commit f5e46aa4a124bfac34a770c4cfe5023de99380d4
Headers show
Series usb: dwc3: gadget: improve isoc handling | expand

Commit Message

Michael Grzeschik July 1, 2020, 6:24 p.m. UTC 
When we have nothing left to be queued after handling the last trb
we have to stop the current transfer. This way we can ensure that
the next request will be queued with a new and valid timestamp
and will not directly run into an missed xfer.

Reviewed-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>

---
v1 -> v2: - This Patch replaces the following patch by Michael Olbrich:
            usb: dwc3: gadget: restart the transfer if a isoc request is queued too late
v2 -> v3: - rearranged condition for easier read (suggested by Tinh Nguyen)
v3 -> v4: - no changes
v4 -> v5: - fixed wording in commit message
---
 drivers/usb/dwc3/gadget.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index b8240ab0ccdaf2a..f6098ce9e7d4ac0 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2738,7 +2738,9 @@  static bool dwc3_gadget_endpoint_trbs_complete(struct dwc3_ep *dep,
 	if (dep->flags & DWC3_EP_END_TRANSFER_PENDING)
 		goto out;
 
-	if (status == -EXDEV && list_empty(&dep->started_list))
+	if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
+		list_empty(&dep->started_list) &&
+		(list_empty(&dep->pending_list) || status == -EXDEV))
 		dwc3_stop_active_transfer(dep, true, true);
 	else if (dwc3_gadget_ep_should_continue(dep))
 		if (__dwc3_gadget_kick_transfer(dep) == 0)