From mboxrd@z Thu Jan  1 00:00:00 1970
From: Juergen Gross <jgross@suse.com>
Subject: [PATCH][linux 2.6.18] pvusb: mark request as consumed
	after finished using it
Date: Fri, 26 Sep 2014 11:10:00 +0200
Message-ID: <1411722600-13380-1-git-send-email-jgross@suse.com>
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Cc: Juergen Gross <jgross@suse.com>
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A request from the pvusb frontend should be marked as consumed by the
backend only after the backend isn't accessing the request data in the
communication ring any more.

Signed-off-by: Juergen Gross <jgross@suse.com>

diff -r 2b001f768b76 drivers/xen/usbback/usbback.c
--- a/drivers/xen/usbback/usbback.c	Tue Jul 08 11:53:53 2014 +0200
+++ b/drivers/xen/usbback/usbback.c	Fri Sep 26 11:01:57 2014 +0200
@@ -1003,10 +1003,10 @@ static int usbbk_start_submit_urb(usbif_
 		}
 
 		req = RING_GET_REQUEST(urb_ring, rc);
-		urb_ring->req_cons = ++rc;
 
 		dispatch_request_to_pending_reqs(usbif, req,
 							pending_req);
+		urb_ring->req_cons = ++rc;
 
 		cond_resched();
 	}