From b33a5b3f856db91e556bc13ad4b7a6c86f75e892 Mon Sep 17 00:00:00 2001
From: Christopher Haster <geky@geky.net>
Date: Tue, 18 Apr 2023 14:56:46 -0500
Subject: [PATCH] Fixed issue where seeking to end-of-directory return
 LFS_ERR_INVAL

This was just an oversight. Seeking to the end of the directory should
not error, but instead restore the directory to the state where the next
read returns 0.

Note this matches the behavior of lfs_file_tell/lfs_file_seek.

Found by sosthene-nitrokey
---
 lfs.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lfs.c b/lfs.c
index 26280fa8..239ad87f 100644
--- a/lfs.c
+++ b/lfs.c
@@ -2595,11 +2595,6 @@ static int lfs_dir_rawseek(lfs_t *lfs, lfs_dir_t *dir, lfs_off_t off) {
     dir->id = (off > 0 && lfs_pair_cmp(dir->head, lfs->root) == 0);
 
     while (off > 0) {
-        int diff = lfs_min(dir->m.count - dir->id, off);
-        dir->id += diff;
-        dir->pos += diff;
-        off -= diff;
-
         if (dir->id == dir->m.count) {
             if (!dir->m.split) {
                 return LFS_ERR_INVAL;
@@ -2612,6 +2607,11 @@ static int lfs_dir_rawseek(lfs_t *lfs, lfs_dir_t *dir, lfs_off_t off) {
 
             dir->id = 0;
         }
+
+        int diff = lfs_min(dir->m.count - dir->id, off);
+        dir->id += diff;
+        dir->pos += diff;
+        off -= diff;
     }
 
     return 0;