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Commit ce3fc8b3 authored by Janusz Dziedzic's avatar Janusz Dziedzic Committed by Felipe Balbi
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usb: dwc3: clean TRB if STARTTRANSFER fail 



In case STARTTRANSFER will fail, clean TRB.
Seems HW in such case don't clean HWO bit.
So, without this cleanup prev_trb still have
HWO bit set.

In my case (without patch), after first START failed:
- dep->enqueue == 1
- dep->dequeue == 1
- prev_trb still have HWO set
- left_trb() == 0
No way to send more data.

Signed-off-by: default avatarJanusz Dziedzic <januszx.dziedzic@linux.intel.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 8ab89da4

drivers/usb/dwc3/gadget.c

+2 −0
Original line number Diff line number Diff line
@@ -1084,6 +1084,8 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param) 
		 * here and stop, unmap, free and del each of the linked

		 * requests instead of what we do now.

		 */

		if (req->trb)

			memset(req->trb, 0, sizeof(struct dwc3_trb));

		dep->queued_requests--;

		dwc3_gadget_giveback(dep, req, ret);

		return ret;