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| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-12-10 14:49:01 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-02-04 01:34:15 -0500 |
| commit | aad9a1cec7dcd1d45809b64643fce37061b17788 (patch) | |
| tree | cd3236a0ab568ef715f68be9777483d0d39feec1 /drivers/vhost | |
| parent | 8ae5e030f30e50a81df1b269d5a5c32d023aa66d (diff) | |
| download | linux-0-day-aad9a1cec7dcd1d45809b64643fce37061b17788.tar.gz linux-0-day-aad9a1cec7dcd1d45809b64643fce37061b17788.tar.xz | |
vhost: switch vhost get_indirect() to iov_iter, kill memcpy_fromiovec()
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: kvm@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vhost.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index cb807d0ea498d..2ee28266fd070 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1125,6 +1125,7 @@ static int get_indirect(struct vhost_virtqueue *vq, struct vring_desc desc; unsigned int i = 0, count, found = 0; u32 len = vhost32_to_cpu(vq, indirect->len); + struct iov_iter from; int ret; /* Sanity check */ @@ -1142,6 +1143,7 @@ static int get_indirect(struct vhost_virtqueue *vq, vq_err(vq, "Translation failure %d in indirect.\n", ret); return ret; } + iov_iter_init(&from, READ, vq->indirect, ret, len); /* We will use the result as an address to read from, so most * architectures only need a compiler barrier here. */ @@ -1164,8 +1166,8 @@ static int get_indirect(struct vhost_virtqueue *vq, i, count); return -EINVAL; } - if (unlikely(memcpy_fromiovec((unsigned char *)&desc, - vq->indirect, sizeof desc))) { + if (unlikely(copy_from_iter(&desc, sizeof(desc), &from) != + sizeof(desc))) { vq_err(vq, "Failed indirect descriptor: idx %d, %zx\n", i, (size_t)vhost64_to_cpu(vq, indirect->addr) + i * sizeof desc); return -EINVAL; |