From: Mikulas Patocka <mpatocka@redhat.com>
Date: Wed, 1 Oct 2008 13:39:17 +0000 (+0100)
Subject: dm: always allow one page in dm_merge_bvec
X-Git-Tag: v2.6.27-rc9~48^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5037108acd4dc40c210321cc83b0bf8352eda95a;p=pandora-kernel.git

dm: always allow one page in dm_merge_bvec

Some callers assume they can always add at least one page to an empty bio,
so dm_merge_bvec should not return 0 in this case: we'll reject the I/O
later after the bio is submitted.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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