wsi: fix VK_INCOMPLETE for vkGetSwapchainImagesKHR

This fixes the x11 and wayland backends to not assert:
dEQP-VK.wsi.xcb.swapchain.get_images.incomplete

Reviewed-by: Jason Ekstrand <[email protected]>
Cc: "13.0" <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>

1 files changed, 11 insertions, 5 deletions

diff --git a/src/vulkan/wsi/wsi_common_x11.c b/src/vulkan/wsi/wsi_common_x11.c
index 137bc7f06f2..8e0043fdc7f 100644
--- a/src/vulkan/wsi/wsi_common_x11.c
+++ b/src/vulkan/wsi/wsi_common_x11.c
@@ -509,19 +509,25 @@ x11_get_images(struct wsi_swapchain *anv_chain,
                uint32_t* pCount, VkImage *pSwapchainImages)
 {
    struct x11_swapchain *chain = (struct x11_swapchain *)anv_chain;
+   uint32_t ret_count;
+   VkResult result;
 
    if (pSwapchainImages == NULL) {
       *pCount = chain->image_count;
       return VK_SUCCESS;
    }
 
-   assert(chain->image_count <= *pCount);
-   for (uint32_t i = 0; i < chain->image_count; i++)
-      pSwapchainImages[i] = chain->images[i].image;
+   result = VK_SUCCESS;
+   ret_count = chain->image_count;
+   if (chain->image_count > *pCount) {
+     ret_count = *pCount;
+     result = VK_INCOMPLETE;
+   }
 
-   *pCount = chain->image_count;
+   for (uint32_t i = 0; i < ret_count; i++)
+      pSwapchainImages[i] = chain->images[i].image;
 
-   return VK_SUCCESS;
+   return result;
 }
 
 static VkResult