From: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Date: Thu, 30 Sep 2010 01:33:41 +0000 (-0700)
Subject: net/9p: Add waitq to VirtIO transport.
X-Git-Tag: v2.6.37-rc1~68^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=52f44e0d08ff1a065bf06615483c608163575cb1;p=pandora-kernel.git

net/9p: Add waitq to VirtIO transport.

If there is not enough space for the PDU on the VirtIO ring, current
code returns -EIO propagating the error to user.

This patch introduced a wqit_queue on the channel, and lets the process
wait on this queue until VirtIO ring frees up.

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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