[PATCH] Touch: Fix duplicate TouchBegin selection with virtual devices

[Daniel Stone]

Given the following scenario:
  1) client A selects for TouchBegin on window W for device D
  2) client B selects for TouchBegin on window W for XIAllDevices
  3) client C selects for TouchBegin on window W with device E

Step 3 will fail with BadImplementation, because attempting to look up
XIAllDevices or XIAllMasterDevices with dixLookupDevices doesn't work.
This should succeed (or, if it was selecting for device D, fail with
BadAccess as it would be a duplicate selection).

Fix this by performing the appropriate lookup for virtual devices.

Signed-off-by: Daniel Stone <daniel at fooishbar.org>
Cc: Peter Hutterer <peter.hutterer at who-t.net>
Cc: Chase Douglas <chase.douglas at ubuntu.com>
---
 Xi/xiselectev.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Xi/xiselectev.c b/Xi/xiselectev.c
index 0e45cb8..ab1b624 100644
--- a/Xi/xiselectev.c
+++ b/Xi/xiselectev.c
@@ -180,8 +180,13 @@ ProcXISelectEvents(ClientPtr client)
                     if (CLIENT_ID(iclient->resource) == client->index)
                         continue;
 
-                    dixLookupDevice(&tmp, evmask->deviceid, serverClient,
-                                    DixReadAccess);
+                    if (evmask->deviceid == XIAllDevices)
+                        tmp = inputInfo.all_devices;
+                    else if (evmask->deviceid == XIAllMasterDevices)
+                        tmp = inputInfo.all_master_devices;
+                    else
+                        dixLookupDevice(&tmp, evmask->deviceid, serverClient,
+                                        DixReadAccess);
                     if (!tmp)
                         return BadImplementation;       /* this shouldn't happen */
 
-- 
1.7.10.4