Here's an answer for the Trusty version question:
The mlx4 driver in 3.13-stable does not include VXLAN support, so does not need this patch. The driver in Ubuntu Trusty does include that support and the affected line of code, so does need this patch.
Here's an answer for the Trusty version question:
The mlx4 driver in 3.13-stable does not include VXLAN support, so does not need this patch. The driver in Ubuntu Trusty does include that support and the affected line of code, so does need this patch.