35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
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From 3b1e3e4e362453df8cecbc6d481444be8b84326e Mon Sep 17 00:00:00 2001
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From: Huawei Xie <huawei.xie@intel.com>
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Date: Fri, 11 Dec 2015 00:07:32 +0800
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Subject: [PATCH] virtio: fix descriptors pointing to the same buffer
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The virtio_net_hdr desc all pointed to the same buffer. It doesn't cause
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issue because in the simple TX mode we don't use the header. This patch
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makes the header desc point to different buffer.
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Fixes: b4ae9c505f2e ("virtio: optimize ring layout")
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Signed-off-by: Huawei Xie <huawei.xie@intel.com>
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Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
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Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
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---
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drivers/net/virtio/virtio_rxtx.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
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index e96352c..a7a58be 100644
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--- a/drivers/net/virtio/virtio_rxtx.c
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+++ b/drivers/net/virtio/virtio_rxtx.c
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@@ -353,7 +353,7 @@ virtio_dev_vring_start(struct virtqueue *vq, int queue_type)
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vq->vq_ring.desc[i + mid_idx].next = i;
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vq->vq_ring.desc[i + mid_idx].addr =
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vq->virtio_net_hdr_mem +
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- mid_idx * vq->hw->vtnet_hdr_size;
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+ i * vq->hw->vtnet_hdr_size;
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vq->vq_ring.desc[i + mid_idx].len =
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vq->hw->vtnet_hdr_size;
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vq->vq_ring.desc[i + mid_idx].flags =
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--
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2.6.2
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