[iov_iter] new primitives - copy_from_iter_full() and friends

[linux-2.6-microblaze.git] / drivers / net / macvtap.c

diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 070e329..19d81ca 100644 (file)
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -673,7 +673,6 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
        int depth;
        bool zerocopy = false;
        size_t linear;
-       ssize_t n;
 
        if (q->flags & IFF_VNET_HDR) {
                vnet_hdr_len = q->vnet_hdr_sz;
@@ -684,8 +683,7 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
                len -= vnet_hdr_len;
 
                err = -EFAULT;
-               n = copy_from_iter(&vnet_hdr, sizeof(vnet_hdr), from);
-               if (n != sizeof(vnet_hdr))
+               if (!copy_from_iter_full(&vnet_hdr, sizeof(vnet_hdr), from))
                        goto err;
                iov_iter_advance(from, vnet_hdr_len - sizeof(vnet_hdr));
                if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&