FAILED: patch "[PATCH] usb: dwc3: gadget: Don't set IMI for no_interrupt" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Possible dependencies:

308c316d16cb ("usb: dwc3: gadget: Don't set IMI for no_interrupt") 0a695d4c75ff ("usb: dwc3: gadget: never ever kill the machine") 6b9018d4c1e5 ("usb: dwc3: gadget: set PCM1 field of isochronous-first TRBs")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 308c316d16cbad99bb834767382baa693ac42169 Mon Sep 17 00:00:00 2001
From: Thinh Nguyen <[email protected]>
Date: Tue, 25 Oct 2022 15:10:20 -0700
Subject: [PATCH] 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.

index 230b3c660054..5fe2d136dff5 100644
@@ -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: