commit 8feb2fb2bb986c533e18037d3c45a5f779421992
author Al Viro <viro@zeniv.linux.org.uk> Thu Nov 06 01:10:59 2014 -0500
committer Al Viro <viro@zeniv.linux.org.uk> Mon Nov 24 05:16:39 2014 -0500
tree 7c10e24137e82d54aaa533aeadc21a2d2dae922c
parent 195e952d03a797aa953f62ffe24ec58693e17ed8

switch AF_PACKET and AF_UNIX to skb_copy_datagram_from_iter()

... and kill skb_copy_datagram_iovec()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

net/packet/af_packet.c

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 108d7f3..dfb148e 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2408,6 +2408,10 @@
 	unsigned short gso_type = 0;
 	int hlen, tlen;
 	int extra_len = 0;
+	struct iov_iter from;
+	ssize_t n;
+
+	iov_iter_init(&from, WRITE, msg->msg_iov, msg->msg_iovlen, len);
 
 	/*
 	 *	Get and verify the address.
@@ -2446,8 +2450,9 @@
 
 		len -= vnet_hdr_len;
 
-		err = memcpy_from_msg((void *)&vnet_hdr, msg, vnet_hdr_len);
-		if (err < 0)
+		err = -EFAULT;
+		n = copy_from_iter(&vnet_hdr, vnet_hdr_len, &from);
+		if (n != vnet_hdr_len)
 			goto out_unlock;
 
 		if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
@@ -2517,7 +2522,7 @@
 	}
 
 	/* Returns -EFAULT on error */
-	err = skb_copy_datagram_from_iovec(skb, offset, msg->msg_iov, 0, len);
+	err = skb_copy_datagram_from_iter(skb, offset, &from, len);
 	if (err)
 		goto out_free;