fs: fat: set start cluster for root directory

When iterating over a child directory we set itr->start_clust.
Do the same when over the root directory.

When looking for deleted directory entries or existing short names we will
have to iterate over directories a second and third time. With this patch
we do not need any special logic for the root directory.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 674236d..5a418cf 100644 (file)
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -734,7 +734,7 @@ static int fat_itr_root(fat_itr *itr, fsdata *fsdata)
                return -ENXIO;
 
        itr->fsdata = fsdata;
-       itr->start_clust = 0;
+       itr->start_clust = fsdata->root_cluster;
        itr->clust = fsdata->root_cluster;
        itr->next_clust = fsdata->root_cluster;
        itr->dent = NULL;
@@ -778,6 +778,7 @@ static void fat_itr_child(fat_itr *itr, fat_itr *parent)
        } else {
                itr->clust = parent->fsdata->root_cluster;
                itr->next_clust = parent->fsdata->root_cluster;
+               itr->start_clust = parent->fsdata->root_cluster;
                itr->is_root = 1;
        }
        itr->dent = NULL;
@@ -1067,6 +1068,7 @@ static int fat_itr_resolve(fat_itr *itr, const char *path, unsigned type)
                        /* point back to itself */
                        itr->clust = itr->fsdata->root_cluster;
                        itr->next_clust = itr->fsdata->root_cluster;
+                       itr->start_clust = itr->fsdata->root_cluster;
                        itr->dent = NULL;
                        itr->remaining = 0;
                        itr->last_cluster = 0;