From: Thinh Nguyen Date: Tue, 25 Oct 2022 22:10:20 +0000 (-0700) Subject: usb: dwc3: gadget: Don't set IMI for no_interrupt X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=308c316d16cbad99bb834767382baa693ac42169;p=linux.git usb: dwc3: gadget: Don't set IMI for no_interrupt The gadget driver may have a certain expectation of how the request completion flow should be from to its configuration. Make sure the controller driver respect that. That is, don't set IMI (Interrupt on Missed Isoc) when usb_request->no_interrupt is set. Also, the driver should only set IMI to the last TRB of a chain. Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver") Cc: stable@vger.kernel.org Signed-off-by: Thinh Nguyen Reviewed-by: Jeff Vanhoof Tested-by: Jeff Vanhoof Link: https://lore.kernel.org/r/ced336c84434571340c07994e3667a0ee284fefe.1666735451.git.Thinh.Nguyen@synopsys.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 230b3c6600540..5fe2d136dff51 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1292,8 +1292,8 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; } - /* always enable Interrupt on Missed ISOC */ - trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; + if (!no_interrupt && !chain) + trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; break; case USB_ENDPOINT_XFER_BULK: