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Commit 42f8eb7a authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: dwc3: gadget: don't force 'LST' always 



the LST bit is to be set on the last of a series
of consecutive TRBs. We had a workaround for a
problem where data would get corrupted but that
doesn't happen anymore. It's likely that it was
caused by some FPGA instability during development
phase.

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 68e823e2

drivers/usb/dwc3/gadget.c

+4 −10
Original line number Diff line number Diff line
@@ -672,15 +672,9 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) 
		if (list_empty(&dep->request_list))

			last_one = 1;



		/*

		 * FIXME we shouldn't need to set LST bit always but we are

		 * facing some weird problem with the Hardware where it doesn't

		 * complete even though it has been previously started.

		 *

		 * While we're debugging the problem, as a workaround to

		 * multiple TRBs handling, use only one TRB at a time.

		 */

		dwc3_prepare_one_trb(dep, req, true);

		dwc3_prepare_one_trb(dep, req, last_one);



		if (last_one)

			break;

	}

}