From: Roger Pau Monne <roger.pau@citrix.com>
Date: Sat, 22 Jun 2013 07:59:17 +0000 (+0200)
Subject: xen-blkback: check the number of iovecs before allocating a bios
X-Git-Tag: v3.11-rc3~32^2~9^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e0f7a21b2fffc70f27cc4a454c60321501045b1;p=pandora-kernel.git

xen-blkback: check the number of iovecs before allocating a bios

With the introduction of indirect segments we can receive requests
with a number of segments bigger than the maximum number of allowed
iovecs in a bios, so make sure that blkback doesn't try to allocate a
bios with more iovecs than BIO_MAX_PAGES

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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