From 915e202aeeb59e272992a6364c910aaef3073544 Mon Sep 17 00:00:00 2001 From: Pratyush Anand Date: Mon, 14 Jan 2013 15:59:35 +0530 Subject: [PATCH] usb: dwc3: gadget: fix skip LINK_TRB on ISOC When we reach to link trb, we just need to increase free_slot and then calculate TRB. Return is not correct, as it will cause wrong TRB DMA address to fetch in case of update transfer. Cc: Signed-off-by: Pratyush Anand Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index e60e72c57663..da8d57cb00e8 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -754,21 +754,18 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3 *dwc = dep->dwc; struct dwc3_trb *trb; - unsigned int cur_slot; - dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n", dep->name, req, (unsigned long long) dma, length, last ? " last" : "", chain ? " chain" : ""); - trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; - cur_slot = dep->free_slot; - dep->free_slot++; - /* Skip the LINK-TRB on ISOC */ - if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && + if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) - return; + dep->free_slot++; + + trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; + dep->free_slot++; if (!req->trb) { dwc3_gadget_move_request_queued(req); -- 2.30.2