Mesa (main): radv: Handle copying zero queries.

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Module: Mesa
Branch: main
Commit: ad0bd2a7d27e864d59dff159f8284110ccebb8bd
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=ad0bd2a7d27e864d59dff159f8284110ccebb8bd

Author: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Date:   Fri Sep 17 00:45:11 2021 +0200

radv: Handle copying zero queries.

Looks like this is allowed.

Fixes: 8475a14302e ("radv: Implement pipeline statistics queries.")
Reviewed-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12907>

---

 src/amd/vulkan/radv_query.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/amd/vulkan/radv_query.c b/src/amd/vulkan/radv_query.c
index 73d005111a7..d6ee60ed896 100644
--- a/src/amd/vulkan/radv_query.c
+++ b/src/amd/vulkan/radv_query.c
@@ -1197,6 +1197,9 @@ radv_CmdCopyQueryPoolResults(VkCommandBuffer commandBuffer, VkQueryPool queryPoo
    uint64_t dest_va = radv_buffer_get_va(dst_buffer->bo);
    dest_va += dst_buffer->offset + dstOffset;
 
+   if (!queryCount)
+      return;
+
    radv_cs_add_buffer(cmd_buffer->device->ws, cmd_buffer->cs, pool->bo);
    radv_cs_add_buffer(cmd_buffer->device->ws, cmd_buffer->cs, dst_buffer->bo);