mg2d: add a designated error code for reaching maxiter

Allows to reliably distinguish it from other error cases. Also specify
that the values of u are defined for this error code.

1 files changed, 1 insertions, 1 deletions

diff --git a/mg2d.c b/mg2d.c
index e0a83ed..b669569 100644
--- a/mg2d.c
+++ b/mg2d.c
@@ -1149,7 +1149,7 @@ int mg2d_solve(MG2DContext *ctx)
         res_prev = res_cur;
     }
 
-    ret = -EDOM;
+    ret = MG2D_ERR_MAXITER_REACHED;
     mg2di_log(&priv->logger, MG2D_LOG_ERROR,
               "Maximum number of iterations (%d) reached\n", ctx->maxiter);
 fail: