From: Thinh Nguyen thinh.nguyen@synopsys.com
commit c7152763f02e05567da27462b2277a554e507c89 upstream.
Currently req->num_trbs is not reset after the TRBs are skipped and processed from the cancelled list. The gadget driver may reuse the request with an invalid req->num_trbs, and DWC3 will incorrectly skip trbs. To fix this, simply reset req->num_trbs to 0 after skipping through all of them.
Fixes: c3acd5901414 ("usb: dwc3: gadget: use num_trbs when skipping TRBs on ->dequeue()") Signed-off-by: Thinh Nguyen thinhn@synopsys.com Signed-off-by: Felipe Balbi felipe.balbi@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/dwc3/gadget.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1506,6 +1506,8 @@ static void dwc3_gadget_ep_skip_trbs(str trb->ctrl &= ~DWC3_TRB_CTRL_HWO; dwc3_ep_inc_deq(dep); } + + req->num_trbs = 0; }
static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep)