linux-kernel - Re: [PATCH 2/2]via-rhine.c: Write-Wake-on-LAN-options-in-_real-time

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Message-ID: <47CE81DA.1010902@garzik.org>
Date:	Wed, 05 Mar 2008 06:19:54 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Laura Garcia <nevola@...il.com>
CC:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2]via-rhine.c: Write-Wake-on-LAN-options-in-_real-time_-not-at-shutdown

Laura Garcia wrote:
> Write Wake-on-LAN options in _real time_ not at shutdown. It might
> be safe in case of power outage.
> 
> Signed-off-by: Laura Garcia Liebana <nevola@...il.com>
> 
> 	modified:   drivers/net/via-rhine.c
> ---
>  drivers/net/via-rhine.c |   76 +++++++++++++++++++++++++---------------------
>  1 files changed, 41 insertions(+), 35 deletions(-)
> 
> diff --git a/drivers/net/via-rhine.c b/drivers/net/via-rhine.c
> index 8c9d6ae..7723ec0 100644
> --- a/drivers/net/via-rhine.c
> +++ b/drivers/net/via-rhine.c
> @@ -418,6 +418,7 @@ static void rhine_tx(struct net_device *dev);
>  static int rhine_rx(struct net_device *dev, int limit);
>  static void rhine_error(struct net_device *dev, int intr_status);
>  static void rhine_set_rx_mode(struct net_device *dev);
> +static void rhine_write_wol(struct net_device *dev);
>  static struct net_device_stats *rhine_get_stats(struct net_device *dev);
>  static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
>  static const struct ethtool_ops netdev_ethtool_ops;
> @@ -1772,7 +1773,7 @@ static void rhine_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
>  	struct rhine_private *rp = netdev_priv(dev);
>  
>  	if (!(rp->quirks & rqWOL))
> -		return;
> +		return; /* Nothing to do for non-WOL adapters */
>  
>  	spin_lock_irq(&rp->lock);
>  	wol->supported = WAKE_PHY | WAKE_MAGIC |
> @@ -1788,7 +1789,7 @@ static int rhine_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
>  		      WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;	/* Untested */
>  
>  	if (!(rp->quirks & rqWOL))
> -		return -EINVAL;
> +		return -EINVAL; /* Nothing to do for non-WOL adapters */
>  
>  	if (wol->wolopts & ~support)
>  		return -EINVAL;
> @@ -1797,9 +1798,47 @@ static int rhine_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
>  	rp->wolopts = wol->wolopts;
>  	spin_unlock_irq(&rp->lock);
>  
> +	rhine_write_wol(dev);
> +
>  	return 0;
>  }
>  
> +static void rhine_write_wol(struct net_device *dev)
> +{
> +	struct rhine_private *rp = netdev_priv(dev);
> +	void __iomem *ioaddr = rp->base;
> +
> +	rhine_power_init(dev);
> +
> +	/* Make sure we use pattern 0, 1 and not 4, 5 */
> +	if (rp->quirks & rq6patterns)
> +		iowrite8(0x04, ioaddr + WOLcgClr);
> +
> +	if (rp->wolopts & WAKE_MAGIC) {
> +		iowrite8(WOLmagic, ioaddr + WOLcrSet);
> +		/*
> +		 * Turn EEPROM-controlled wake-up back on -- some hardware may
> +		 * not cooperate otherwise.
> +		 */
> +		iowrite8(ioread8(ioaddr + ConfigA) | 0x03, ioaddr + ConfigA);
> +	}
> +
> +	if (rp->wolopts & (WAKE_BCAST|WAKE_MCAST))
> +		iowrite8(WOLbmcast, ioaddr + WOLcgSet);
> +
> +	if (rp->wolopts & WAKE_PHY)
> +		iowrite8(WOLlnkon | WOLlnkoff, ioaddr + WOLcrSet);
> +
> +	if (rp->wolopts & WAKE_UCAST)
> +		iowrite8(WOLucast, ioaddr + WOLcrSet);
> +
> +	if (rp->wolopts) {
> +		/* Enable legacy WOL (for old motherboards) */
> +		iowrite8(0x01, ioaddr + PwcfgSet);
> +		iowrite8(ioread8(ioaddr + StickyHW) | 0x04, ioaddr + StickyHW);
> +	}
> +}
> +
>  static const struct ethtool_ops netdev_ethtool_ops = {
>  	.get_drvinfo		= netdev_get_drvinfo,
>  	.get_settings		= netdev_get_settings,
> @@ -1886,39 +1925,6 @@ static void rhine_shutdown (struct pci_dev *pdev)
>  	struct rhine_private *rp = netdev_priv(dev);
>  	void __iomem *ioaddr = rp->base;
>  
> -	if (!(rp->quirks & rqWOL))
> -		return; /* Nothing to do for non-WOL adapters */
> -
> -	rhine_power_init(dev);
> -
> -	/* Make sure we use pattern 0, 1 and not 4, 5 */
> -	if (rp->quirks & rq6patterns)
> -		iowrite8(0x04, ioaddr + WOLcgClr);
> -
> -	if (rp->wolopts & WAKE_MAGIC) {
> -		iowrite8(WOLmagic, ioaddr + WOLcrSet);
> -		/*
> -		 * Turn EEPROM-controlled wake-up back on -- some hardware may
> -		 * not cooperate otherwise.
> -		 */
> -		iowrite8(ioread8(ioaddr + ConfigA) | 0x03, ioaddr + ConfigA);
> -	}
> -
> -	if (rp->wolopts & (WAKE_BCAST|WAKE_MCAST))
> -		iowrite8(WOLbmcast, ioaddr + WOLcgSet);
> -
> -	if (rp->wolopts & WAKE_PHY)
> -		iowrite8(WOLlnkon | WOLlnkoff, ioaddr + WOLcrSet);
> -
> -	if (rp->wolopts & WAKE_UCAST)
> -		iowrite8(WOLucast, ioaddr + WOLcrSet);
> -
> -	if (rp->wolopts) {
> -		/* Enable legacy WOL (for old motherboards) */
> -		iowrite8(0x01, ioaddr + PwcfgSet);
> -		iowrite8(ioread8(ioaddr + StickyHW) | 0x04, ioaddr + StickyHW);
> -	}

can you please first create a patch that moves code into 
rhine_set_wol(), yet changes no behavior?

That makes for an easier review, and a better bisect'ing step

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