tree 652338ba728cc84e217894d79fe7b03c9fdd5883
parent ca01583539b62729609e0ec8c21c813b75617a21
author Sunghan Suh <sunghan.suh@samsung.com> 1372849805 +0900
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1374881405 -0700

zram: prevent data loss in error cases of function zram_bvec_write()

In function zram_bvec_write(), previous data at the index is
already freed by function zram_free_page().
When failed to compress or zs_malloc, there is no way to restore old data.
Therefore, free previous data when it's about to update.

Also, no need to check whether table is not empty outside of
function zram_free_page(), because the function properly checks inside.

Signed-off-by: Sunghan Suh <sunghan.suh@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>