Hello.
On 10-01-2013 13:53, Pratyush Anand wrote:
There were still some corner cases where isoc transfer was not able to
restart, specially when missed isoc does not happen , and in fact gadget does
not queue any new request during giveback.
Cleanup function calls giveback first, which provides a way to queue
another request to gadget. But gadget did not had any data. So , it did
not call ep_queue. To twist it further, gadget did not queue till
cleanup for last queued TRB is called. If we ever reach this scenario,
we must call END TRANSFER, so that we receive a new xfernotready with
information about current microframe number.
Also insure that there is no request submitted to core when issuing END
TRANSFER.
Signed-off-by: Pratyush Anand <pratyush.an...@st.com>
---
drivers/usb/dwc3/gadget.c | 23 ++++++++++++++++++-----
1 files changed, 18 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 4d24711..45db6df 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
[...]
@@ -1727,10 +1730,20 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc,
struct dwc3_ep *dep,
break;
} while (1);
- if (list_empty(&dep->req_queued) &&
- (dep->flags & DWC3_EP_MISSED_ISOC)) {
- dwc3_stop_active_transfer(dwc, dep->number);
- dep->flags &= ~DWC3_EP_MISSED_ISOC;
+ if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
+ (list_empty(&dep->req_queued))) {
Parens not needed at all around list_empty() invocation.
WBR, Sergei
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