Unverified Commit 24fdaeeb authored Nov 25, 2020 by Peter Chen

usb: cdns3: gadget: clear trb->length as zero after preparing every trb

It clears trb->length as zero before preparing td, but if scatter
buffer is used for td, there are several trbs within td, it needs to clear
every trb->length as zero, otherwise, the default value for trb->length
may not be zero after it begins to use the second round of trb rings.

Fixes: abc6b579 ("usb: cdns3: gadget: using correct sg operations")
Signed-off-by: Peter Chen <peter.chen@nxp.com>

parent 6703052f

drivers/usb/cdns3/gadget.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1260,6 +1260,7 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
		priv_req->end_trb = priv_ep->enqueue;
		cdns3_ep_inc_enq(priv_ep);
		trb = priv_ep->trb_pool + priv_ep->enqueue;
		trb->length = 0;
		} while (sg_iter < num_trb);

		trb = priv_req->trb;

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