linux-kernel - Re: [PATCH RT 2/4] net: gianfar: do not try to cleanup TX packets if they are not done

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Date:	Mon, 28 Apr 2014 08:37:56 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	linux-rt-users <linux-rt-users@...r.kernel.org>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Carsten Emde <C.Emde@...dl.org>,
	John Kacur <jkacur@...hat.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	stable-rt@...r.kernel.org
Subject: Re: [PATCH RT 2/4] net: gianfar: do not try to cleanup TX packets
 if they are not done

On 04/27/2014 04:31 PM, Steven Rostedt wrote:
> diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
> index 5c0efcc..8aecc1d 100644
> --- a/drivers/net/ethernet/freescale/gianfar.c
> +++ b/drivers/net/ethernet/freescale/gianfar.c
> @@ -2856,10 +2855,14 @@ static int gfar_poll(struct napi_struct *napi, int budget)
>  			tx_queue = priv->tx_queue[i];
>  			/* run Tx cleanup to completion */
>  			if (tx_queue->tx_skbuff[tx_queue->skb_dirtytx]) {
> -				gfar_clean_tx_ring(tx_queue);
> -				has_tx_work = 1;
> +				int ret;
> +
> +				ret = gfar_clean_tx_ring(tx_queue);
> +				if (ret)
> +					has_tx_work++;
>  			}
>  		}
> +		work_done += has_tx_work;
>  
>  		for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
>  			/* skip queue if not active */

The 3.14-RT version of the patch should have an additional return
statement here which I forgot initially.

Sebastian
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