Guard against nested allows with ref name cachingsh-fix-gitaly-find-commit-caching

This avoids the case:

```
allow_ref_name_caching do
  allow_ref_name_caching do
    # using-feature
  end
end
```

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/gitlab/gitaly_client.rb b/lib/gitlab/gitaly_client.rb
index bc2f7693fdc..42195f566eb 100644
--- a/lib/gitlab/gitaly_client.rb
+++ b/lib/gitlab/gitaly_client.rb
@@ -302,6 +302,7 @@ module Gitlab
     # branch, this method allows caching of the ref name directly.
     def self.allow_ref_name_caching
       return yield unless Gitlab::SafeRequestStore.active?
+      return yield if ref_name_caching_allowed?
 
       begin
         Gitlab::SafeRequestStore[:allow_ref_name_caching] = true