fs: fat: Reduce default max clustersize 64KiB from malloc pool

Release cluster block immediately when no longer use would help to reduce
64KiB memory allocated to the memory pool.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index f593e98..6ade4ea 100644 (file)
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -1148,7 +1148,15 @@ int file_fat_read_at(const char *filename, loff_t pos, void *buffer,
                goto out_free_both;
 
        debug("reading %s at pos %llu\n", filename, pos);
-       ret = get_contents(&fsdata, itr->dent, pos, buffer, maxsize, actread);
+
+       /* For saving default max clustersize memory allocated to malloc pool */
+       dir_entry *dentptr = itr->dent;
+
+       free(itr);
+
+       itr = NULL;
+
+       ret = get_contents(&fsdata, dentptr, pos, buffer, maxsize, actread);
 
 out_free_both:
        free(fsdata.fatbuf);