[PATCH 4.19 22/27] usb: mtu3: set interval of FS intr and isoc endpoint

[Greg Kroah-Hartman]

From: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>

commit 43f3b8cbcf93da7c2755af4a543280c31f4adf16 upstream.

Add support to set interval also for FS intr and isoc endpoint.

Fixes: 4d79e042ed8b ("usb: mtu3: add support for usb3.1 IP")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211218095749.6250-4-chunfeng.yun@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/mtu3/mtu3_gadget.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -98,6 +98,13 @@ static int mtu3_ep_enable(struct mtu3_ep
 			mult = usb_endpoint_maxp_mult(desc) - 1;
 		}
 		break;
+	case USB_SPEED_FULL:
+		if (usb_endpoint_xfer_isoc(desc))
+			interval = clamp_val(desc->bInterval, 1, 16);
+		else if (usb_endpoint_xfer_int(desc))
+			interval = clamp_val(desc->bInterval, 1, 255);
+
+		break;
 	default:
 		break; /*others are ignored */
 	}