From 94d2d84bcafa3f491c55583154fd543a9b62f836 Mon Sep 17 00:00:00 2001 From: Thinh Nguyen Date: Thu, 5 Mar 2020 13:24:01 -0800 Subject: [PATCH] usb: dwc3: gadget: Wrap around when skip TRBs commit 2dedea035ae82c5af0595637a6eda4655532b21e upstream. When skipping TRBs, we need to account for wrapping around the ring buffer and not modifying some invalid TRBs. Without this fix, dwc3 won't be able to check for available TRBs. Cc: stable Fixes: 7746a8dfb3f9 ("usb: dwc3: gadget: extract dwc3_gadget_ep_skip_trbs()") Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 6ac02ba..09d6b11 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1518,7 +1518,7 @@ static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep, struct dwc3_request *r for (i = 0; i < req->num_trbs; i++) { struct dwc3_trb *trb; - trb = req->trb + i; + trb = &dep->trb_pool[dep->trb_dequeue]; trb->ctrl &= ~DWC3_TRB_CTRL_HWO; dwc3_ep_inc_deq(dep); } -- 2.7.4