* eglot.el (eglot-xref-backend): Don't check capability here.

eglot.el

@@ -1705,9 +1705,7 @@ Calls REPORT-FN maybe if server publishes diagnostics in time."
     (funcall report-fn (cdr eglot--unreported-diagnostics))
     (setq eglot--unreported-diagnostics nil)))
 
-(defun eglot-xref-backend ()
-  "EGLOT xref backend."
-  (when (eglot--server-capable :definitionProvider) 'eglot))
+(defun eglot-xref-backend () "EGLOT xref backend." 'eglot)
 
 (defvar eglot--temp-location-buffers (make-hash-table :test #'equal)
   "Helper variable for `eglot--handling-xrefs'.")
@@ -1783,9 +1781,12 @@ Try to visit the target file for a richer summary line."
                                              (eglot--TextDocumentPositionParams)
                                              extra-params)))))
 
-(defun eglot--lsp-xref-helper (method)
+(cl-defun eglot--lsp-xref-helper (method &key extra-params capability )
   "Helper for `eglot-find-declaration' & friends."
-  (let ((eglot--lsp-xref-refs (eglot--lsp-xrefs-for-method method)))
+  (let ((eglot--lsp-xref-refs (eglot--lsp-xrefs-for-method
+                               method
+                               :extra-params extra-params
+                               :capability capability)))
     (xref-find-references "LSP identifier at point.")))
 
 (defun eglot-find-declaration ()