commandPools/cmdBuffers are only required for swapchain configurations
that use a blit-queue. They do not need to be allocated at all in the
"no blit" configuration.
There are some validUsage issues with the commandPool allocation, namely
that the WSI impl assumes that the logical device was created with all
queueFamilies made available to it. This is an invalid assumption that
can result in: VUID-vkCreateCommandPool-queueFamilyIndex-01937 invalid
usage on the eventual call to the driver. Note: invalid usage by WSI
wouldn't normally be detectable without virtualization.
This change reduces the scope of that invalid usage.
Reviewed-by: Gurchetan Singh <gurchetansingh@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36361>
796e11008d