Merge pull request #639 from SciML/ChrisRackauckas-patch-1

Fix LinearSolveCUDAExt.jl

Author: ChrisRackauckas

ext/LinearSolveCUDAExt.jl

@@ -3,7 +3,8 @@ module LinearSolveCUDAExt
 using CUDA
 using LinearSolve: LinearSolve, is_cusparse, defaultalg, cudss_loaded, DefaultLinearSolver, 
                    DefaultAlgorithmChoice, ALREADY_WARNED_CUDSS, LinearCache, needs_concrete_A,
-                   error_no_cudss_lu, CUDSS_LOADED, init_cacheval
+                   error_no_cudss_lu, init_cacheval, OperatorAssumptions, CudaOffloadFactorization,
+                   SparspakFactorization, KLUFactorization, UMFPACKFactorization
 using LinearSolve.LinearAlgebra, LinearSolve.SciMLBase, LinearSolve.ArrayInterface
 using SciMLBase: AbstractSciMLOperator
 
@@ -25,7 +26,7 @@ function LinearSolve.defaultalg(A::CUDA.CUSPARSE.CuSparseMatrixCSR{Tv, Ti}, b,
 end
 
 function LinearSolve.error_no_cudss_lu(A::CUDA.CUSPARSE.CuSparseMatrixCSR)
-    if !LinearSolve.CUDSS_LOADED[]
+    if !LinearSolve.cudss_loaded(A)
         error("CUDSS.jl is required for LU Factorizations on CuSparseMatrixCSR. Please load this library.")
     end
     nothing