tree 2646065fd3b332e51af6d2c141833e6a00a7441b
parent 467622ef2acb01986eab37ef96c3632b3ea35999
author Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> 1225923676 +0100
committer David Woodhouse <David.Woodhouse@intel.com> 1225923722 +0100

[JFFS2] fix race condition in jffs2_lzo_compress()

deflate_mutex protects the globals lzo_mem and lzo_compress_buf.  However,
jffs2_lzo_compress() unlocks deflate_mutex _before_ it has copied out the
compressed data from lzo_compress_buf.  Correct this by moving the mutex
unlock after the copy.

In addition, document what deflate_mutex actually protects.

Cc: stable@kernel.org
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Richard Purdie <rpurdie@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>