From: Jason Wang <jasowang@redhat.com>
Date: Wed, 2 May 2012 03:42:06 +0000 (+0800)
Subject: macvtap: zerocopy: set SKBTX_DEV_ZEROCOPY only when skb is built successfully
X-Git-Tag: v3.2.24~90
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cc64214d05941d09bb9f80051a1949a7223b8ab7;p=pandora-kernel.git

macvtap: zerocopy: set SKBTX_DEV_ZEROCOPY only when skb is built successfully

commit 01d6657b388438def19c8baaea28e742b6ed32ec upstream.

Current the SKBTX_DEV_ZEROCOPY is set unconditionally after
zerocopy_sg_from_iovec(), this would lead NULL pointer when macvtap
fails to build zerocopy skb because destructor_arg was not
initialized. Solve this by set this flag after the skb were built
successfully.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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