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usb: dwc3: gadget: check for Missed Isoc from event status 

In case we get an event with status set to Missed Isoc, this means we
have missed an isochronous interval and should issue End Transfer
command and wait for the following XferNotReady.

Let's do that early, rather than late.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2018-03-29 12:49:28 +03:00
parent 58f0218a27
commit 6d8a019614
2 changed files with 14 additions and 5 deletions
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5
drivers/usb/dwc3/core.h
View File

@ -1204,11 +1204,12 @@ struct dwc3_event_depevt {
/* Within XferNotReady */
#define DEPEVT_STATUS_TRANSFER_ACTIVE BIT(3)
/* Within XferComplete */
/* Within XferComplete or XferInProgress */
#define DEPEVT_STATUS_BUSERR BIT(0)
#define DEPEVT_STATUS_SHORT BIT(1)
#define DEPEVT_STATUS_IOC BIT(2)
#define DEPEVT_STATUS_LST BIT(3)
#define DEPEVT_STATUS_LST BIT(3) /* XferComplete */
#define DEPEVT_STATUS_MISSED_ISOC BIT(3) /* XferInProgress */
/* Stream event only */
#define DEPEVT_STREAMEVT_FOUND 1

14
drivers/usb/dwc3/gadget.c
View File

@ -2396,9 +2396,6 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep,
* entry is added into request list.
*/
dep->flags = DWC3_EP_PENDING_REQUEST;
} else {
dwc3_stop_active_transfer(dep, true);
dep->flags = DWC3_EP_ENABLED;
}
}
}
@ -2418,14 +2415,25 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep,
{
struct dwc3 *dwc = dep->dwc;
unsigned status = 0;
bool stop = false;
dwc3_gadget_endpoint_frame_from_event(dep, event);
if (event->status & DEPEVT_STATUS_BUSERR)
status = -ECONNRESET;
if (event->status & DEPEVT_STATUS_MISSED_ISOC) {
status = -EXDEV;
stop = true;
}
dwc3_gadget_ep_cleanup_completed_requests(dep, event, status);
if (stop) {
dwc3_stop_active_transfer(dep, true);
dep->flags = DWC3_EP_ENABLED;
}
/*
* WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround.
* See dwc3_gadget_linksts_change_interrupt() for 1st half.