From: Peng Tao <tao.peng@primarydata.com>
Date: Wed, 5 Nov 2014 14:36:50 +0000 (+0800)
Subject: nfs: fix pnfs direct write memory leak
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~109^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8c393f9a721c30a030049a680e1bf896669bb279;p=pandora-kernel.git

nfs: fix pnfs direct write memory leak

For pNFS direct writes, layout driver may dynamically allocate ds_cinfo.buckets.
So we need to take care to free them when freeing dreq.

Ideally this needs to be done inside layout driver where ds_cinfo.buckets
are allocated. But buckets are attached to dreq and reused across LD IO iterations.
So I feel it's OK to free them in the generic layer.

Cc: stable@vger.kernel.org [v3.4+]
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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