From cbbf61af932ae27308f9f43e126ca25808cff31c Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Thu, 30 Jan 2020 17:09:29 +1100
Subject: [PATCH] HAL_Linux: fixed bitmask error on storage erase

---
 libraries/AP_HAL_Linux/Storage.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libraries/AP_HAL_Linux/Storage.cpp b/libraries/AP_HAL_Linux/Storage.cpp
index 67b79f2f77..9d779051cd 100644
--- a/libraries/AP_HAL_Linux/Storage.cpp
+++ b/libraries/AP_HAL_Linux/Storage.cpp
@@ -183,7 +183,10 @@ void Storage::init()
  */
 void Storage::_mark_dirty(uint16_t loc, uint16_t length)
 {
-    uint16_t end = loc + length;
+    if (length == 0) {
+        return;
+    }
+    uint16_t end = loc + length - 1;
     for (uint8_t line=loc>>LINUX_STORAGE_LINE_SHIFT;
          line <= end>>LINUX_STORAGE_LINE_SHIFT;
          line++) {