[U-Boot] [PATCH v2 2/2] fs: fat: Reduce default max clustersize 64KiB from malloc pool

[tien.fong.chee at intel.com]

From: Tien Fong Chee <tien.fong.chee at intel.com>

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 at intel.com>

---

changes for v2
- Assigned NULL to itr after free.
- Added NULL checking to itr, avoid freeing twice.
---
 fs/fat/fat.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 347787e..fa846ff 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -1152,12 +1152,21 @@ 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);
 out_free_itr:
-	free(itr);
+	if (itr)
+		free(itr);
 	return ret;
 }
 
-- 
2.2.0