From cb6dfc4169c2ea3390b3cd5e1fe2885c13826601 Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Mon, 2 Jun 2025 13:15:06 -0400
Subject: [PATCH] zink: unlock instance mutex if creation fails

avoids a deadlock

Fixes: 015eda4a418 ("zink: deduplicate VkDevice and VkInstance")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35292>
---
 src/gallium/drivers/zink/zink_screen.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/zink/zink_screen.c b/src/gallium/drivers/zink/zink_screen.c
index d67e37509e2..a6c50a7e5cf 100644
--- a/src/gallium/drivers/zink/zink_screen.c
+++ b/src/gallium/drivers/zink/zink_screen.c
@@ -3275,8 +3275,10 @@ zink_internal_create_screen(const struct pipe_screen_config *config, int64_t dev
    if (++instance_refcount == 1) {
       instance_info.loader_version = zink_get_loader_version(screen);
       instance = zink_create_instance(screen, &instance_info);
-      if (!instance)
+      if (!instance) {
+         simple_mtx_unlock(&instance_lock);
          goto fail;
+      }
    } else {
       assert(instance);
    }