mg2d: check and propagate the error from mg_solve_subgrid()

1 files changed, 6 insertions, 2 deletions

diff --git a/mg2d.c b/mg2d.c
index 5d089b8..061ae91 100644
--- a/mg2d.c
+++ b/mg2d.c
@@ -471,7 +471,9 @@ int mg2d_solve(MG2DContext *ctx)
     res_prev = s_root->residual_max;
 
     for (int i = 0; i < ctx->maxiter; i++) {
-        mg_solve_subgrid(ctx, root);
+        ret = mg_solve_subgrid(ctx, root);
+        if (ret < 0)
+            goto fail;
 
         res_cur = s_root->residual_max;
 
@@ -491,8 +493,10 @@ int mg2d_solve(MG2DContext *ctx)
         res_prev = res_cur;
     }
 
+    ret = -EDOM;
+fail:
     mg2di_log(&priv->logger, MG2D_LOG_ERROR, "The solver failed to converge\n");
-    return -EDOM;
+    return ret;
 }
 
 static void mg_level_free(MG2DLevel **plevel)