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| author | Tim Smith <tim@electronghost.co.uk> | 2014-02-07 18:58:43 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2014-02-07 18:58:43 +0000 |
| commit | 8961749e5f498d91ded20dc797bb77aa366bca2e (patch) | |
| tree | 08c688b2a90f43617e18c0efc26f308722a89e53 /net/rxrpc | |
| parent | 38dbfb59d1175ef458d006556061adeaa8751b72 (diff) | |
| download | linux-stable-8961749e5f498d91ded20dc797bb77aa366bca2e.tar.gz linux-stable-8961749e5f498d91ded20dc797bb77aa366bca2e.tar.bz2 linux-stable-8961749e5f498d91ded20dc797bb77aa366bca2e.zip | |
af_rxrpc: Remove incorrect checksum calculation from rxrpc_recvmsg()
The UDP checksum was already verified in rxrpc_data_ready() - which calls
skb_checksum_complete() - as the RxRPC packet header contains no checksum of
its own. Subsequent calls to skb_copy_and_csum_datagram_iovec() are thus
redundant and are, in any case, being passed only a subset of the UDP payload -
so the checksum will always fail if that path is taken.
So there is no need to check skb->ip_summed in rxrpc_recvmsg(), and no need for
the csum_copy_error: exit path.
Signed-off-by: Tim Smith <tim@electronghost.co.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc')
| -rw-r--r-- | net/rxrpc/ar-recvmsg.c | 25 |
1 files changed, 1 insertions, 24 deletions
diff --git a/net/rxrpc/ar-recvmsg.c b/net/rxrpc/ar-recvmsg.c index 34b5490dde65..e9aaa65c0778 100644 --- a/net/rxrpc/ar-recvmsg.c +++ b/net/rxrpc/ar-recvmsg.c @@ -180,16 +180,7 @@ int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock, if (copy > len - copied) copy = len - copied; - if (skb->ip_summed == CHECKSUM_UNNECESSARY || - skb->ip_summed == CHECKSUM_PARTIAL) { - ret = skb_copy_datagram_iovec(skb, offset, - msg->msg_iov, copy); - } else { - ret = skb_copy_and_csum_datagram_iovec(skb, offset, - msg->msg_iov); - if (ret == -EINVAL) - goto csum_copy_error; - } + ret = skb_copy_datagram_iovec(skb, offset, msg->msg_iov, copy); if (ret < 0) goto copy_error; @@ -348,20 +339,6 @@ copy_error: _leave(" = %d", ret); return ret; -csum_copy_error: - _debug("csum error"); - release_sock(&rx->sk); - if (continue_call) - rxrpc_put_call(continue_call); - rxrpc_kill_skb(skb); - if (!(flags & MSG_PEEK)) { - if (skb_dequeue(&rx->sk.sk_receive_queue) != skb) - BUG(); - } - skb_kill_datagram(&rx->sk, skb, flags); - rxrpc_put_call(call); - return -EAGAIN; - wait_interrupted: ret = sock_intr_errno(timeo); wait_error: |