[Mesa-dev] [PATCH v4] anv: fix multiple creation with internal failure

[Lionel Landwerlin]

The specification section 9.4 says :

   When an application attempts to create many pipelines in a single
   command, it is possible that some subset may fail creation. In that
   case, the corresponding entries in the pPipelines output array will
   be filled with VK_NULL_HANDLE values. If any pipeline fails
   creation (for example, due to out of memory errors), the
   vkCreate*Pipelines commands will return an error code. The
   implementation will attempt to create all pipelines, and only
   return VK_NULL_HANDLE values for those that actually failed.

Fixes :

   dEQP-VK.api.object_management.alloc_callback_fail_multiple.graphics_pipeline

v2: C is hard let's go shopping (Lionel)

v3: Remove unnecessary condition in for loops (Lionel)

v4: Document why we return on first failure (Eduardo)
    Move i declaration inside for() (Eduardo)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
 src/intel/vulkan/genX_pipeline.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/src/intel/vulkan/genX_pipeline.c b/src/intel/vulkan/genX_pipeline.c
index 845d0204d8..f5bf8944e3 100644
--- a/src/intel/vulkan/genX_pipeline.c
+++ b/src/intel/vulkan/genX_pipeline.c
@@ -1469,22 +1469,22 @@ VkResult genX(CreateGraphicsPipelines)(

    VkResult result = VK_SUCCESS;

-   unsigned i = 0;
-   for (; i < count; i++) {
+   for (unsigned i = 0; i < count; i++) {
       result = genX(graphics_pipeline_create)(_device,
                                               pipeline_cache,
                                               &pCreateInfos[i],
                                               pAllocator, &pPipelines[i]);
-      if (result != VK_SUCCESS) {
-         for (unsigned j = 0; j < i; j++) {
-            anv_DestroyPipeline(_device, pPipelines[j], pAllocator);
-         }

-         return result;
+      /* Bail out on the first error as it is not obvious what error should be
+       * report upon 2 different failures. */
+      if (result != VK_SUCCESS) {
+         for (; i < count; i++)
+            pPipelines[i] = VK_NULL_HANDLE;
+         break;
       }
    }

-   return VK_SUCCESS;
+   return result;
 }

 VkResult genX(CreateComputePipelines)(
@@ -1499,19 +1499,19 @@ VkResult genX(CreateComputePipelines)(

    VkResult result = VK_SUCCESS;

-   unsigned i = 0;
-   for (; i < count; i++) {
+   for (unsigned i = 0; i < count; i++) {
       result = compute_pipeline_create(_device, pipeline_cache,
                                        &pCreateInfos[i],
                                        pAllocator, &pPipelines[i]);
-      if (result != VK_SUCCESS) {
-         for (unsigned j = 0; j < i; j++) {
-            anv_DestroyPipeline(_device, pPipelines[j], pAllocator);
-         }

-         return result;
+      /* Bail out on the first error as it is not obvious what error should be
+       * report upon 2 different failures. */
+      if (result != VK_SUCCESS) {
+         for (; i < count; i++)
+            pPipelines[i] = VK_NULL_HANDLE;
+         break;
       }
    }

-   return VK_SUCCESS;
+   return result;
 }
--
2.11.0