netdev - Re: [PATCH 2/2 next] sky2: B0_Y2LED controls the LEDs for both ports

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Message-ID: <20090831091623.43b134ee@nehalam>
Date:	Mon, 31 Aug 2009 09:16:23 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Mike McCormack <mikem@...g3k.org>
Cc:	netdev@...r.kernel.org, Rene Mayrhofer <rene@...rhofer.eu.org>,
	Richard Leitner <leitner@...s.at>
Subject: Re: [PATCH 2/2 next] sky2: B0_Y2LED controls the LEDs for both
 ports

On Sun, 30 Aug 2009 12:58:46 +0900
Mike McCormack <mikem@...g3k.org> wrote:

> Only disable LED status control when both ports are disabled.
> The previous code disabled LED status control unconditionally
>  in sky2_down.
> 
> Tested with the limitation that my sky2 interface has no LEDs
>  and a single port.
> 
> Signed-off-by: Mike McCormack <mikem@...g3k.org>
> ---
>  drivers/net/sky2.c |   23 ++++++++++++++++++++---
>  1 files changed, 20 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
> index 2827f0d..864b8dc 100644
> --- a/drivers/net/sky2.c
> +++ b/drivers/net/sky2.c
> @@ -213,6 +213,22 @@ static inline u16 gm_phy_read(struct sky2_hw *hw, unsigned port, u16 reg)
>  	return v;
>  }
>  
> +static void sky2_disable_status_led(struct sky2_port *sky2)
> +{
> +	struct sky2_hw *hw = sky2->hw;
> +	struct net_device *otherdev = hw->dev[sky2->port^1];
> +
> +	if (!(otherdev && netif_running(otherdev))) {
> +		sky2_write8(hw, B0_Y2LED, LED_STAT_OFF);
> +	}
> +}
> +
> +static void sky2_enable_status_led(struct sky2_port *sky2)
> +{
> +	struct sky2_hw *hw = sky2->hw;
> +
> +	sky2_write8(hw, B0_Y2LED, LED_STAT_ON);
> +}
>  
>  static void sky2_power_on(struct sky2_hw *hw)
>  {
> @@ -1530,6 +1546,8 @@ static int sky2_up(struct net_device *dev)
>  	if (err)
>  		goto err_out;
>  
> +	sky2_enable_status_led(sky2);
> +
>  	/* Enable interrupts from phy/mac for port */
>  	imask = sky2_read32(hw, B0_IMSK);
>  	imask |= portirq_msk[port];
> @@ -1886,8 +1904,7 @@ static int sky2_down(struct net_device *dev)
>  	sky2_phy_power_down(hw, port);
>  	spin_unlock_bh(&sky2->phy_lock);
>  
> -	/* turn off LED's */
> -	sky2_write16(hw, B0_Y2LED, LED_STAT_OFF);
> +	sky2_disable_status_led(sky2);
>  
>  	sky2_tx_reset(hw, port);
>  
> @@ -2989,7 +3006,7 @@ static void sky2_reset(struct sky2_hw *hw)
>  	sky2_write8(hw, B2_TI_CTRL, TIM_STOP);
>  	sky2_write8(hw, B2_TI_CTRL, TIM_CLR_IRQ);
>  
> -	sky2_write8(hw, B0_Y2LED, LED_STAT_ON);
> +	sky2_write8(hw, B0_Y2LED, LED_STAT_OFF);
>  
>  	/* Turn off descriptor polling */
>  	sky2_write32(hw, B28_DPT_CTRL, DPT_STOP);

NAK. I have simpler version of this coming.

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