Revert "usb: gadget: composite: always set ep->mult to a sensible value"

BugLink: http://bugs.launchpad.net/bugs/1655969

This reverts commit c53af76d which is
commit eaa496ff upstream as it was
incorrect.
Reported-by: Bin Liu <b-liu@ti.com>
Cc: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

drivers/usb/gadget/composite.c

@@ -148,12 +148,7 @@ int config_ep_by_speed(struct usb_gadget *g,
 	_ep->desc = chosen_desc;
 	_ep->comp_desc = NULL;
 	_ep->maxburst = 0;
-	_ep->mult = 1;
-
-	if (g->speed == USB_SPEED_HIGH && (usb_endpoint_xfer_isoc(_ep->desc) ||
-				usb_endpoint_xfer_int(_ep->desc)))
-		_ep->mult = usb_endpoint_maxp(_ep->desc) & 0x7ff;
-
+	_ep->mult = 0;
 	if (!want_comp_desc)
 		return 0;
 
@@ -170,7 +165,7 @@ int config_ep_by_speed(struct usb_gadget *g,
 		switch (usb_endpoint_type(_ep->desc)) {
 		case USB_ENDPOINT_XFER_ISOC:
 			/* mult: bits 1:0 of bmAttributes */
-			_ep->mult = (comp_desc->bmAttributes & 0x3) + 1;
+			_ep->mult = comp_desc->bmAttributes & 0x3;
 		case USB_ENDPOINT_XFER_BULK:
 		case USB_ENDPOINT_XFER_INT:
 			_ep->maxburst = comp_desc->bMaxBurst + 1;

drivers/usb/gadget/function/uvc_video.c

@@ -243,7 +243,7 @@ uvc_video_alloc_requests(struct uvc_video *video)
 
 	req_size = video->ep->maxpacket
 		 * max_t(unsigned int, video->ep->maxburst, 1)
-		 * (video->ep->mult);
+		 * (video->ep->mult + 1);
 
 	for (i = 0; i < UVC_NUM_REQUESTS; ++i) {
 		video->req_buffer[i] = kmalloc(req_size, GFP_KERNEL);