From 06d6958df944fb0a5d8285bf6d8223b635fc07c5 Mon Sep 17 00:00:00 2001
From: Richard Li <richard.li@ces.hk>
Date: Mon, 15 Jun 2026 13:10:02 +0800
Subject: [PATCH] Fixed PL18 USB storage file copy will not persist problem

---
 .../common/arm/stm32/diskio_spi_flash.cpp      | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/radio/src/targets/common/arm/stm32/diskio_spi_flash.cpp b/radio/src/targets/common/arm/stm32/diskio_spi_flash.cpp
index 91dc07cf54f..df67cb36e56 100644
--- a/radio/src/targets/common/arm/stm32/diskio_spi_flash.cpp
+++ b/radio/src/targets/common/arm/stm32/diskio_spi_flash.cpp
@@ -91,13 +91,21 @@ static DSTATUS spi_flash_initialize(BYTE lun)
   }
 
 #if defined(USE_FLASH_FTL)
-  int flashSize = flashSpiGetSize();
-  int flashSizeMB = flashSize  / 1024 / 1024;
+  if (frftlInitDone) {
+    // Do flush when trying to reinit spi flash,
+    // because the frftl only need to be initialized once
+    if (!ftlSync(&_frftl)) {
+      return STA_NOINIT;
+    }
+  } else {
+    int flashSize = flashSpiGetSize();
+    int flashSizeMB = flashSize  / 1024 / 1024;
 
-  if (!ftlInit(&_frftl, &_frftl_cb, flashSizeMB)) {
-    return STA_NOINIT;
+    if (!ftlInit(&_frftl, &_frftl_cb, flashSizeMB)) {
+      return STA_NOINIT;
+    }
+    frftlInitDone = true;
   }
-  frftlInitDone = true;
 #endif
 
   return 0;