If the ring is full and we are processing a big sglist, then let's interrupt so we can, later, add more TRBs to the ring. Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> --- drivers/usb/dwc3/gadget.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index c776fb7f524a..90b3d7965136 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -758,6 +758,8 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep, kfree(req); } +static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep); + /** * dwc3_prepare_one_trb - setup one TRB from one request * @dep: endpoint for which this request is prepared @@ -818,7 +820,8 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, /* always enable Continue on Short Packet */ trb->ctrl |= DWC3_TRB_CTRL_CSP; - if (!req->request.no_interrupt && !chain) + if ((!req->request.no_interrupt && !chain) || + (dwc3_calc_trbs_left(dep) == 0)) trb->ctrl |= DWC3_TRB_CTRL_IOC | DWC3_TRB_CTRL_ISP_IMI; if (chain) -- 2.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
