From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Date: Wed, 16 Mar 2016 06:44:56 +0000 (+0800)
Subject: vhost: remove unnecessary memset when enqueueing
X-Git-Tag: spdx-start~7252
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=b3869ebebfb1267d81bc4cdc8b12c0d0d484a03d;hp=b3869ebebfb1267d81bc4cdc8b12c0d0d484a03d;p=dpdk.git

vhost: remove unnecessary memset when enqueueing

We have to reset the virtio net hdr at virtio_enqueue_offload()
before, due to all mbufs share a single virtio_hdr structure:

	struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0, }, 0};

	foreach (mbuf) {
		virtio_enqueue_offload(mbuf, &virtio_hdr.hdr);

		copy net hdr and mbuf to desc buf
	}

However, after the vhost rxtx refactor, the code looks like:

	copy_mbuf_to_desc(mbuf)
	{
		struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0, }, 0}

		virtio_enqueue_offload(mbuf, &virtio_hdr.hdr);

		copy net hdr and mbuf to desc buf
	}

	foreach (mbuf) {
		copy_mbuf_to_desc(mbuf);
	}

Therefore, the memset at virtio_enqueue_offload() is not necessary
any more; remove it.

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Acked-by: Huawei Xie <huawei.xie@intel.com>
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