netdev - Re: [PATCH 1/5] net: sh_eth: remove unnecessary function

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Date:	Fri, 16 Mar 2012 10:57:19 +0100
From:	Florian Fainelli <florian@...nwrt.org>
To:	"Shimoda, Yoshihiro" <yoshihiro.shimoda.uh@...esas.com>
CC:	netdev <netdev@...r.kernel.org>,
	SH-Linux <linux-sh@...r.kernel.org>
Subject: Re: [PATCH 1/5] net: sh_eth: remove unnecessary function

Hello,

Le 03/16/12 09:46, Shimoda, Yoshihiro a écrit :
> The sh_eth_timer() called mod_timer() for itself.
> So, this patch removes the function.

You could avoid using this timer if you implement PHYLIB in your driver, 
which will poll the PHY for you and report the link state consistently.

>
> Signed-off-by: Yoshihiro Shimoda<yoshihiro.shimoda.uh@...esas.com>
> ---
>   drivers/net/ethernet/renesas/sh_eth.c |   22 ----------------------
>   drivers/net/ethernet/renesas/sh_eth.h |    1 -
>   2 files changed, 0 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
> index 8615961..2c99b10 100644
> --- a/drivers/net/ethernet/renesas/sh_eth.c
> +++ b/drivers/net/ethernet/renesas/sh_eth.c
> @@ -1163,14 +1163,6 @@ other_irq:
>   	return ret;
>   }
>
> -static void sh_eth_timer(unsigned long data)
> -{
> -	struct net_device *ndev = (struct net_device *)data;
> -	struct sh_eth_private *mdp = netdev_priv(ndev);
> -
> -	mod_timer(&mdp->timer, jiffies + (10 * HZ));
> -}
> -
>   /* PHY state control function */
>   static void sh_eth_adjust_link(struct net_device *ndev)
>   {
> @@ -1418,11 +1410,6 @@ static int sh_eth_open(struct net_device *ndev)
>   	if (ret)
>   		goto out_free_irq;
>
> -	/* Set the timer to check for link beat. */
> -	init_timer(&mdp->timer);
> -	mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
> -	setup_timer(&mdp->timer, sh_eth_timer, (unsigned long)ndev);
> -
>   	return ret;
>
>   out_free_irq:
> @@ -1447,9 +1434,6 @@ static void sh_eth_tx_timeout(struct net_device *ndev)
>   	/* tx_errors count up */
>   	ndev->stats.tx_errors++;
>
> -	/* timer off */
> -	del_timer_sync(&mdp->timer);
> -
>   	/* Free all the skbuffs in the Rx queue. */
>   	for (i = 0; i<  RX_RING_SIZE; i++) {
>   		rxdesc =&mdp->rx_ring[i];
> @@ -1467,10 +1451,6 @@ static void sh_eth_tx_timeout(struct net_device *ndev)
>
>   	/* device init */
>   	sh_eth_dev_init(ndev);
> -
> -	/* timer on */
> -	mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
> -	add_timer(&mdp->timer);
>   }
>
>   /* Packet transmit function */
> @@ -1543,8 +1523,6 @@ static int sh_eth_close(struct net_device *ndev)
>
>   	free_irq(ndev->irq, ndev);
>
> -	del_timer_sync(&mdp->timer);
> -
>   	/* Free all the skbuffs in the Rx queue. */
>   	sh_eth_ring_free(ndev);
>
> diff --git a/drivers/net/ethernet/renesas/sh_eth.h b/drivers/net/ethernet/renesas/sh_eth.h
> index 57dc262..e4e4d18 100644
> --- a/drivers/net/ethernet/renesas/sh_eth.h
> +++ b/drivers/net/ethernet/renesas/sh_eth.h
> @@ -765,7 +765,6 @@ struct sh_eth_private {
>   	struct sh_eth_txdesc *tx_ring;
>   	struct sk_buff **rx_skbuff;
>   	struct sk_buff **tx_skbuff;
> -	struct timer_list timer;
>   	spinlock_t lock;
>   	u32 cur_rx, dirty_rx;	/* Producer/consumer ring indices */
>   	u32 cur_tx, dirty_tx;
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