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| author | Michael S. Tsirkin <mst@redhat.com> | 2014-10-24 14:19:48 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-12-09 12:05:29 +0200 |
| commit | 8b38694a2dc8b18374310df50174f1e4376d6824 (patch) | |
| tree | 6eab5ca0936192876d12faa2ef76a1cb04fe5af8 /drivers/vhost/net.c | |
| parent | 3b1bbe89351a8003857aeb5cbef3595f5d0ee609 (diff) | |
| download | linux-stable-8b38694a2dc8b18374310df50174f1e4376d6824.tar.gz linux-stable-8b38694a2dc8b18374310df50174f1e4376d6824.tar.bz2 linux-stable-8b38694a2dc8b18374310df50174f1e4376d6824.zip | |
vhost/net: virtio 1.0 byte swap
I had to add an explicit tag to suppress compiler warning:
gcc isn't smart enough to notice that
len is always initialized since function is called with size > 0.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'drivers/vhost/net.c')
| -rw-r--r-- | drivers/vhost/net.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index dce5c58174b7..c218188c8880 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -416,7 +416,7 @@ static void handle_tx(struct vhost_net *net) struct ubuf_info *ubuf; ubuf = nvq->ubuf_info + nvq->upend_idx; - vq->heads[nvq->upend_idx].id = head; + vq->heads[nvq->upend_idx].id = cpu_to_vhost32(vq, head); vq->heads[nvq->upend_idx].len = VHOST_DMA_IN_PROGRESS; ubuf->callback = vhost_zerocopy_callback; ubuf->ctx = nvq->ubufs; @@ -500,6 +500,10 @@ static int get_rx_bufs(struct vhost_virtqueue *vq, int headcount = 0; unsigned d; int r, nlogs = 0; + /* len is always initialized before use since we are always called with + * datalen > 0. + */ + u32 uninitialized_var(len); while (datalen > 0 && headcount < quota) { if (unlikely(seg >= UIO_MAXIOV)) { @@ -527,13 +531,14 @@ static int get_rx_bufs(struct vhost_virtqueue *vq, nlogs += *log_num; log += *log_num; } - heads[headcount].id = d; - heads[headcount].len = iov_length(vq->iov + seg, in); - datalen -= heads[headcount].len; + heads[headcount].id = cpu_to_vhost32(vq, d); + len = iov_length(vq->iov + seg, in); + heads[headcount].len = cpu_to_vhost32(vq, len); + datalen -= len; ++headcount; seg += in; } - heads[headcount - 1].len += datalen; + heads[headcount - 1].len = cpu_to_vhost32(vq, len - datalen); *iovcount = seg; if (unlikely(log)) *log_num = nlogs; |