netdev - Re: [PATCH] mrp: add periodictimer to retry lost packets

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Date:	Wed, 18 Sep 2013 11:20:19 -0700
From:	Joe Perches <joe@...ches.com>
To:	Noel Burton-Krahn <noel@...ton-krahn.com>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] mrp: add periodictimer to retry lost packets

On Wed, 2013-09-18 at 10:09 -0700, Noel Burton-Krahn wrote:
> MRP doesn't implement the periodictimer in 802.1Q, so it never retries
> if packets get lost.  I ran into this problem when MRP sent a MVRP
> JoinIn before the interface was fully up.  The JoinIn was lost, MRP
> didn't retry, and MVRP registration failed.

Beyond the whitespace errors that make this not apply:

> diff --git a/net/802/mrp.c b/net/802/mrp.c
[]
> @@ -595,6 +600,26 @@ static void mrp_join_timer(unsigned long data)
>      mrp_join_timer_arm(app);
>  }
> 
> +static void mrp_periodic_timer_arm(struct mrp_applicant *app)
> +{
> +    unsigned long delay;
> +
> +    delay = (u64)msecs_to_jiffies(mrp_periodic_time);

Useless cast to u64

> +    mod_timer(&app->periodic_timer, jiffies + delay);

This might also be neater without the temporary

static void mrp_periodic_timer_arm(struct mrp_applicant *app)
{
	mod_timer(&app->periodic_timer,
		  jiffies + msecs_to_jiffies(mrp_periodic_timer));
}


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