Commit fffe033f authored by Felipe Balbi's avatar Felipe Balbi Committed by Luis Henriques

usb: dwc3: gadget: don't clear EP_BUSY too early

commit e18b7975 upstream.

In case of non-Isochronous transfers, we don't
want to clear DWC3_EP_BUSY flag until XferComplete
event. That's because XferInProgress was only enabled
so we can recycle TRBs and usb_requests quicker, but
there are still other pending requests being transferred.

In order to make sure we don't allow for another StartTransfer
command while the HW is still processing other transfers,
we must keep DWC3_EP_BUSY flag set and this what this patch
does.

Fixes: f3af3651 (usb: dwc3: gadget: always enable IOC on
	bulk/interrupt transfers)
Reported-by: default avatarsundeep subbaraya <sundeep.lkml@gmail.com>
Tested-by: default avatarsundeep subbaraya <sundeep.lkml@gmail.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent e2f8dc01
......@@ -1987,12 +1987,16 @@ static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc,
{
unsigned status = 0;
int clean_busy;
u32 is_xfer_complete;
is_xfer_complete = (event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE);
if (event->status & DEPEVT_STATUS_BUSERR)
status = -ECONNRESET;
clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status);
if (clean_busy)
if (clean_busy && (is_xfer_complete ||
usb_endpoint_xfer_isoc(dep->endpoint.desc)))
dep->flags &= ~DWC3_EP_BUSY;
/*
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment