zink: check for error when calling vkEnumeratePhysicalDevices

It seems it's possible for Lavapipe to fail to enumerate the physical
devices, so let's handle that and fail all the way up here.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7881>

diff --git a/src/gallium/drivers/zink/zink_screen.c b/src/gallium/drivers/zink/zink_screen.c
index 56cd9b7..d1b37ae 100644 (file)
--- a/src/gallium/drivers/zink/zink_screen.c
+++ b/src/gallium/drivers/zink/zink_screen.c
@@ -710,11 +710,15 @@ choose_pdev(const VkInstance instance)
 {
    uint32_t i, pdev_count;
    VkPhysicalDevice *pdevs, pdev = NULL;
-   vkEnumeratePhysicalDevices(instance, &pdev_count, NULL);
+   VkResult result = vkEnumeratePhysicalDevices(instance, &pdev_count, NULL);
+   if (result != VK_SUCCESS)
+      return VK_NULL_HANDLE;
+
    assert(pdev_count > 0);
 
    pdevs = malloc(sizeof(*pdevs) * pdev_count);
-   vkEnumeratePhysicalDevices(instance, &pdev_count, pdevs);
+   result = vkEnumeratePhysicalDevices(instance, &pdev_count, pdevs);
+   assert(result == VK_SUCCESS);
    assert(pdev_count > 0);
 
    for (i = 0; i < pdev_count; ++i) {