From: Christoph Hellwig <hch@lst.de>
Date: Tue, 25 May 2010 12:17:54 +0000 (+0200)
Subject: virtio-blk: fix minimum number of S/G elements
X-Git-Tag: v2.6.35-rc2~48^2~2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a5b365a652206ca300256974ed9301a7d241a6ed;p=pandora-kernel.git

virtio-blk: fix minimum number of S/G elements

We need at least one S/G element to operate properly, as does the block
layer which increments it to one anyway.  We hit this due to a qemu
bug which advertises a sg_elements of 0 under some circumstances.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (tweaked logic)
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