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usb: dwc3: gadget: simplify queueing of isoc transfers

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After all the previous changes, it's now a lot clearer how isoc
transfers should be managed. We don't need to try to End Transfers
from ep_queue since that's already done by cleanup_requests.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2018-03-29 13:23:53 +03:00
parent 4d588a145b
commit fe990cea8e
1 changed files with 8 additions and 14 deletions
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22
drivers/usb/dwc3/gadget.c
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@ -1322,24 +1322,18 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
* errors which will force us issue EndTransfer command.
*/
if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
if ((dep->flags & DWC3_EP_PENDING_REQUEST)) {
if (dep->flags & DWC3_EP_TRANSFER_STARTED) {
dwc3_stop_active_transfer(dep, true);
dep->flags = DWC3_EP_ENABLED;
} else {
__dwc3_gadget_start_isoc(dep);
dep->flags &= ~DWC3_EP_PENDING_REQUEST;
}
if (!(dep->flags & DWC3_EP_PENDING_REQUEST) &&
!(dep->flags & DWC3_EP_TRANSFER_STARTED))
return 0;
if ((dep->flags & DWC3_EP_PENDING_REQUEST)) {
if (!(dep->flags & DWC3_EP_TRANSFER_STARTED)) {
__dwc3_gadget_start_isoc(dep);
return 0;
}
}
if (dep->flags & DWC3_EP_TRANSFER_STARTED)
goto out;
return 0;
}
out:
return __dwc3_gadget_kick_transfer(dep);
}