From e3eeee486636c0717e66c9a0ae216339abb14ddd Mon Sep 17 00:00:00 2001
From: Ben Ashbaugh <ben.ashbaugh@intel.com>
Date: Tue, 4 Aug 2026 11:34:39 -0700
Subject: [PATCH] check that devices match in the command buffer emulation
 layer

This error condition specifically:
CL_INVALID_DEVICE if any element of queues does not have the same device as the command-queue set on command_buffer creation at the same list index.
---
 layers/10_cmdbufemu/emulate.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/layers/10_cmdbufemu/emulate.cpp b/layers/10_cmdbufemu/emulate.cpp
index 4b475fe..526d83a 100644
--- a/layers/10_cmdbufemu/emulate.cpp
+++ b/layers/10_cmdbufemu/emulate.cpp
@@ -1503,6 +1503,14 @@ typedef struct _cl_command_buffer_khr
             &cmdbuf_context,
             nullptr);
 
+        cl_device_id cmdbuf_device = nullptr;
+        g_pNextDispatch->clGetCommandQueueInfo(
+            getQueue(),
+            CL_QUEUE_DEVICE,
+            sizeof(cmdbuf_device),
+            &cmdbuf_device,
+            nullptr);
+
         for( cl_uint q = 0; q < num_queues && queues; q++ )
         {
             if( queues[q] == nullptr )
@@ -1521,6 +1529,18 @@ typedef struct _cl_command_buffer_khr
             {
                 return CL_INVALID_CONTEXT;
             }
+
+            cl_device_id queue_device = nullptr;
+            g_pNextDispatch->clGetCommandQueueInfo(
+                queues[q],
+                CL_QUEUE_DEVICE,
+                sizeof(queue_device),
+                &queue_device,
+                nullptr);
+            if( queue_device != cmdbuf_device )
+            {
+                return CL_INVALID_DEVICE;
+            }
         }
 
         // CL_INCOMPATIBLE_COMMAND_QUEUE_KHR if any element of queues is not compatible with the command-queue set on command_buffer creation at the same list index.