tree c02399fd3ce118719e0f209234747b82509102d3
parent d1d390a0285b02f0118e16227ac08de7e3ce74c9
author Benoît Thébaudeau <benoit@wsystem.com> 1443447932 +0200
committer Tom Rini <trini@konsulko.com> 1444597928 -0400

fs/fat/fat_write: Fix management of empty files

Overwriting an empty file not created by U-Boot did not work, and it
could even corrupt the FAT. Moreover, creating empty files or emptying
existing files allocated a cluster, which is not standard.

Fix this by always keeping empty files clusterless as specified by
Microsoft (the start cluster must be set to 0 in the directory entry in
that case), and by supporting overwriting such files.

Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>