The rxrpc_lookup_peer() function returns NULL on error, it never returns
error pointers.
Fixes: 8496af50eb38 ('rxrpc: Use RCU to access a peer's service connection tree') Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: David Howells <[email protected]> Signed-off-by: David S. Miller <[email protected]>