From da223b36b63bee8a8453a8abd23bda33ac3bce48 Mon Sep 17 00:00:00 2001
From: pgardratzama <pierre.gardrat@zama.ai>
Date: Thu, 25 Sep 2025 16:54:36 +0200
Subject: [PATCH] fix(hpu): reduce polling period of backend on iop ack file
 from 10 to 2us

---
 backends/tfhe-hpu-backend/config_store/v80/hpu_config.toml | 2 +-
 backends/tfhe-hpu-backend/src/ffi/v80/mod.rs               | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/backends/tfhe-hpu-backend/config_store/v80/hpu_config.toml b/backends/tfhe-hpu-backend/config_store/v80/hpu_config.toml
index 889e8cfdc..8e86e4e56 100644
--- a/backends/tfhe-hpu-backend/config_store/v80/hpu_config.toml
+++ b/backends/tfhe-hpu-backend/config_store/v80/hpu_config.toml
@@ -4,7 +4,7 @@
           "${HPU_BACKEND_DIR}/config_store/${HPU_CONFIG}/hpu_regif_core_cfg_3in3.toml",
           "${HPU_BACKEND_DIR}/config_store/${HPU_CONFIG}/hpu_regif_core_prc_1in3.toml",
           "${HPU_BACKEND_DIR}/config_store/${HPU_CONFIG}/hpu_regif_core_prc_3in3.toml"]
-  polling_us=10
+  polling_us=2
 [fpga.ffi.V80]
   id="${V80_PCIE_DEV}"
   board_sn="${V80_SERIAL_NUMBER}"
diff --git a/backends/tfhe-hpu-backend/src/ffi/v80/mod.rs b/backends/tfhe-hpu-backend/src/ffi/v80/mod.rs
index 0e493ab06..783b0fe71 100644
--- a/backends/tfhe-hpu-backend/src/ffi/v80/mod.rs
+++ b/backends/tfhe-hpu-backend/src/ffi/v80/mod.rs
@@ -89,7 +89,8 @@ impl HpuHw {
         } else {
             Err(format!(
                 "UUID mismatch loaded {:?} expected {:?}",
-                current_uuid, pdi.metadata.bitstream.uuid.to_lowercase()
+                current_uuid,
+                pdi.metadata.bitstream.uuid.to_lowercase()
             )
             .into())
         }