From 3999fcba1558e96a299f8f533ab74ba541108691 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Tue, 26 Apr 2022 01:09:18 -0700
Subject: [PATCH] dzn: Fix dzn_cmd_buffer_collect_queries()

We can have an empty dzn_cmd_buffer_query_pool_state::collect
bitset, handle that case properly.

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16396>
---
 src/microsoft/vulkan/dzn_cmd_buffer.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/microsoft/vulkan/dzn_cmd_buffer.c b/src/microsoft/vulkan/dzn_cmd_buffer.c
index 374fb06bbff..a8f7ae3df60 100644
--- a/src/microsoft/vulkan/dzn_cmd_buffer.c
+++ b/src/microsoft/vulkan/dzn_cmd_buffer.c
@@ -516,6 +516,9 @@ dzn_cmd_buffer_collect_queries(struct dzn_cmd_buffer *cmdbuf,
    uint32_t nbits = util_dynarray_num_elements(&state->collect, BITSET_WORD) * BITSET_WORDBITS;
    uint32_t start, end;
 
+   if (!nbits)
+      return VK_SUCCESS;
+
    query_count = MIN2(query_count, nbits - first_query);
    nbits = MIN2(first_query + query_count, nbits);