From d85a0fe2e2f1a2c48d80b05a29c3c60a28c7e3b0 Mon Sep 17 00:00:00 2001
From: ondrap <pilat.ondrej@seznam.cz>
Date: Tue, 29 Aug 2023 12:50:16 +0200
Subject: [PATCH] Move lookahead buffer offset at the first free block if such
 block doesn't exist move it for whole lookahead size.

---
 lfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lfs.c b/lfs.c
index 250e7346..3664e801 100644
--- a/lfs.c
+++ b/lfs.c
@@ -662,7 +662,9 @@ static int lfs_alloc(lfs_t *lfs, lfs_block_t *block) {
 }
 
 int lfs_find_free_blocks(lfs_t *lfs){
-    lfs->free.off = (lfs->free.off + lfs->free.size)
+    // Move free offset at the first unused block (lfs->free.i)
+    // lfs->free.i is equal lfs->free.size when all blocks are used
+    lfs->free.off = (lfs->free.off + lfs->free.i)
         % lfs->block_count;
     lfs->free.size = lfs_min(8*lfs->cfg->lookahead_size, lfs->free.ack);
     lfs->free.i = 0;