weston: Touch events cause startup failure

Pressing the touch panel continously during boot up caused
weston to crash. The weston view was being accessed before it
was fully initialized, so now we guard against this.

Upstream-Status: Denied [Could not reproduce]

Signed-off-by: Tom Hochstein <tom.hochstein@nxp.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 45 insertions, 0 deletions

diff --git a/recipes-graphics/wayland/weston/0020-xwayland-Fix-crash-when-run-with-no-input-device.patch b/recipes-graphics/wayland/weston/0020-xwayland-Fix-crash-when-run-with-no-input-device.patch
new file mode 100644
index 00000000..1304cef2
--- /dev/null
+++ b/recipes-graphics/wayland/weston/0020-xwayland-Fix-crash-when-run-with-no-input-device.patch
@@ -0,0 +1,45 @@
+From 60f8817f371123b9c36b3ff1120eec1e8f9e3d10 Mon Sep 17 00:00:00 2001
+From: Tom Hochstein <tom.hochstein@nxp.com>
+Date: Mon, 31 Oct 2016 19:21:58 -0500
+Subject: [PATCH weston] xwayland: Fix crash when run with no input device
+
+Starting an xterm with no input device led to a crash
+because weston_wm_pick_seat() was returning garbage and
+weston_wm_selection_init() was trying to use the garbage.
+
+Signed-off-by: Tom Hochstein <tom.hochstein@nxp.com>
+---
+ xwayland/selection.c      | 10 +++++++---
+ xwayland/window-manager.c |  6 ++++--
+ 2 files changed, 11 insertions(+), 5 deletions(-)
+
+Index: weston-1.11.0/xwayland/selection.c
+===================================================================
+--- weston-1.11.0.orig/xwayland/selection.c     2016-05-19 16:36:04.000000000 -0500
++++ weston-1.11.0/xwayland/selection.c  2016-11-01 14:32:48.000000000 -0500
+@@ -708,6 +708,8 @@
+                                          wm->atom.clipboard, mask);
+ 
+        seat = weston_wm_pick_seat(wm);
++       if (seat != NULL)
++               return;
+        wm->selection_listener.notify = weston_wm_set_selection;
+        wl_signal_add(&seat->selection_signal, &wm->selection_listener);
+ 
+Index: weston-1.11.0/xwayland/window-manager.c
+===================================================================
+--- weston-1.11.0.orig/xwayland/window-manager.c        2016-05-19 16:36:04.000000000 -0500
++++ weston-1.11.0/xwayland/window-manager.c     2016-11-01 11:47:14.549606964 -0500
+@@ -1303,8 +1303,10 @@
+ struct weston_seat *
+ weston_wm_pick_seat(struct weston_wm *wm)
+ {
+-       return container_of(wm->server->compositor->seat_list.next,
+-                           struct weston_seat, link);
++       struct wl_list *seats = wm->server->compositor->seat_list.next;
++       if (wl_list_empty(seats))
++               return NULL;
++       return container_of(seats, struct weston_seat, link);
+ }
+ 
+ static struct weston_seat *