From: Gu Zheng <guz.fnst@cn.fujitsu.com>
Date: Tue, 1 Jul 2014 16:36:47 +0000 (-0600)
Subject: bio-integrity: add "bip_max_vcnt" into struct bio_integrity_payload
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~75^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cbcd1054a1fd2aa980fc11ff28e436fc4aaa2d54;p=pandora-kernel.git

bio-integrity: add "bip_max_vcnt" into struct bio_integrity_payload

Commit 08778795 ("block: Fix nr_vecs for inline integrity vectors") from
Martin introduces the function bip_integrity_vecs(get the useful vectors)
to fix the issue about nr_vecs for inline integrity vectors that reported
by David Milburn.

But it seems that bip_integrity_vecs() will return the wrong number if the
bio is not based on any bio_set for some reason(bio->bi_pool == NULL),
because in that case, the bip_inline_vecs[0] is malloced directly.  So
here we add the bip_max_vcnt to record the count of vector slots, and
cleanup the function bip_integrity_vecs().

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

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