tree 837fb3196236998c3c3ae44762ed3167ef0256f4
parent 2f718ffc16c43a435d12919c75dbfad518abd056
author Nick Piggin <npiggin@suse.de> 1192523100 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1192552975 -0700

fs: fix data-loss on error

New buffers against uptodate pages are simply be marked uptodate, while the
buffer_new bit remains set.  This causes error-case code to zero out parts of
those buffers because it thinks they contain stale data: wrong, they are
actually uptodate so this is a data loss situation.

Fix this by actually clearning buffer_new and marking the buffer dirty.  It
makes sense to always clear buffer_new before setting a buffer uptodate.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>