From ac6b08c8e9d2ee9497924ded5024ee6ed8ec4976 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@midokura.com>
Date: Sat, 21 Nov 2020 11:36:57 +0900
Subject: [PATCH] fs/spiffs/src/spiffs_mtd.c: Fix a syslog format

---
 fs/spiffs/src/spiffs_mtd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/spiffs/src/spiffs_mtd.c b/fs/spiffs/src/spiffs_mtd.c
index 1a3feb74bc..ac2846ea72 100644
--- a/fs/spiffs/src/spiffs_mtd.c
+++ b/fs/spiffs/src/spiffs_mtd.c
@@ -471,7 +471,7 @@ ssize_t spiffs_mtd_erase(FAR struct spiffs_s *fs, off_t offset, size_t len)
   nerased = MTD_ERASE(fs->mtd, eblkstart, eblkend - eblkstart);
   if (nerased < 0)
     {
-      ferr("ERROR: MTD_ERASE() failed: %d\n");
+      ferr("ERROR: MTD_ERASE() failed: %zd\n", nerased);
       return nerased;
     }