[Xen-changelog] [linux-2.6.18-xen] fbfront: fix connecting to backend

[Xen patchbot-linux-2.6.18-xen <patchbot@xxxxxxx>]

# HG changeset patch
# User Juergen Gross <jgross@xxxxxxxx>
# Date 1493901224 -7200
#      Thu May 04 14:33:44 2017 +0200
# Node ID cdd45550a01399d4b74c9a2a2f4d13fe2fd0f402
# Parent  6dceaf8439228ba45948713fdc3136bc0b117383
fbfront: fix connecting to backend

Connecting to the backend isn't working reliably in xen-fbfront: in
case XenbusStateInitWait of the backend has been missed the backend
transition to XenbusStateConnected will trigger the connected state
only without doing the actions required when the backend has
connected.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Committed-by: Jan Beulich <jbeulich@xxxxxxxx>
---


diff -r 6dceaf843922 -r cdd45550a013 drivers/xen/fbfront/xenfb.c
--- a/drivers/xen/fbfront/xenfb.c       Thu May 04 14:29:03 2017 +0200
+++ b/drivers/xen/fbfront/xenfb.c       Thu May 04 14:33:44 2017 +0200
@@ -807,7 +807,6 @@ static void xenfb_backend_changed(struct
                break;
 
        case XenbusStateInitWait:
-       InitWait:
                xenbus_switch_state(dev, XenbusStateConnected);
                break;
 
@@ -818,8 +817,8 @@ static void xenfb_backend_changed(struct
                 * get Connected twice here.
                 */
                if (dev->state != XenbusStateConnected)
-                       goto InitWait; /* no InitWait seen yet, fudge it */
-
+                       /* no InitWait seen yet, fudge it */
+                       xenbus_switch_state(dev, XenbusStateConnected);
 
                if (xenbus_scanf(XBT_NIL, dev->otherend,
                                        "feature-resize", "%d", &val) < 0)

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