From 99ff84f27aafed1748aeca11bdc136c61794495a Mon Sep 17 00:00:00 2001
From: Cheng Gong <enigne@gmail.com>
Date: Wed, 25 Oct 2023 13:11:20 -0500
Subject: [PATCH] [EnzymeExt] Prefix AbstractKrylovSubspaceMethod to avoid
 undefvarerror

---
 ext/LinearSolveEnzymeExt.jl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ext/LinearSolveEnzymeExt.jl b/ext/LinearSolveEnzymeExt.jl
index 607189e10..fea332dcd 100644
--- a/ext/LinearSolveEnzymeExt.jl
+++ b/ext/LinearSolveEnzymeExt.jl
@@ -144,7 +144,7 @@ function EnzymeCore.EnzymeRules.reverse(config, func::Const{typeof(LinearSolve.s
             _linsolve.cacheval' \ dy
         elseif _linsolve.cacheval isa Tuple && _linsolve.cacheval[1] isa Factorization
             _linsolve.cacheval[1]' \ dy
-        elseif _linsolve.alg isa AbstractKrylovSubspaceMethod
+        elseif _linsolve.alg isa LinearSolve.AbstractKrylovSubspaceMethod
             # Doesn't modify `A`, so it's safe to just reuse it
             invprob = LinearSolve.LinearProblem(transpose(_linsolve.A), dy)
             solve(invprob;
@@ -163,4 +163,4 @@ function EnzymeCore.EnzymeRules.reverse(config, func::Const{typeof(LinearSolve.s
     return (nothing,)
 end
 
-end
\ No newline at end of file
+end