From: Saeed Mahameed <sae...@mellanox.com>
Date: Sun, 21 Jan 2018 05:30:42 +0200
> From: Talat Batheesh <tal...@mellanox.com>
>
> Helmut reported a bug about division by zero while
> running traffic and doing physical cable pull test.
>
> When the cable unplugged the ppms become zero, so when
> dividing the current ppms by the previous ppms in the
> next dim iteration there is division by zero.
>
> This patch prevent this division for both ppms and epms.
>
> Fixes: c3164d2fc48f ("net/mlx5e: Added BW check for DIM decision mechanism")
> Reported-by: Helmut Grauer <helmut.gra...@de.ibm.com>
> Signed-off-by: Talat Batheesh <tal...@mellanox.com>
> Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
> ---
> v2:
> - Fix spelling in commit message.
>
> This patch is the equivalent of:
> ("net/dim: Fix fixpoint divide exception in net_dim_stats_compare")
> which was already submitted to net-next. Since mlx5 irq moderation code
> got moved in net-next, this patch should only go to net and skip net-next.
>
> for -stable: 4.12.y and later.
Applied and queue up for -stable, thank you.
