tree b268f9b6beba39274edf9b250ea3cfe22bebe25a
parent 4357450af3422219d3f77bd54f7b9a8a40f193c9
author Willem de Bruijn <willemb@google.com> 1409760078 -0400
committer David S. Miller <davem@davemloft.net> 1409954563 -0700

net-timestamp: only report sw timestamp if reporting bit is set

The timestamping API has separate bits for generating and reporting
timestamps. A software timestamp should only be reported for a packet
when the packet has the relevant generation flag (SKBTX_..) set
and the socket has reporting bit SOF_TIMESTAMPING_SOFTWARE set.

The second check was accidentally removed. Reinstitute the original
behavior.

Tested:
  Without this patch, Documentation/networking/txtimestamp reports
  timestamps regardless of whether SOF_TIMESTAMPING_SOFTWARE is set.
  After the patch, it only reports them when the flag is set.

Fixes: f24b9be5957b ("net-timestamp: extend SCM_TIMESTAMPING ancillary data struct")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>