From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Thu, 1 Jul 2010 10:49:18 +0000 (+0900)
Subject: scsi: add sd_unprep_fn to free discard page
X-Git-Tag: v2.6.36-rc1~288^2~110
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f1126e950d28ff875d96ed6a04a9ff96c7bfc357;p=pandora-kernel.git

scsi: add sd_unprep_fn to free discard page

This fixes discard page leak by using q->unprep_rq_fn facility.

q->unprep_rq_fn is called when all the data buffer (req->bio and
scsi_data_buffer) in the request is freed.

sd_unprep() uses rq->buffer to free discard page allocated in
sd_prepare_discard().

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---

Reading git-diff-tree failed