linux-kernel - Re: [PATCH] net: netcp: remove call to netif_carrier

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Message-ID: <553A4623.2070802@cogentembedded.com>
Date:	Fri, 24 Apr 2015 16:33:23 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Murali Karicheri <m-karicheri2@...com>, netdev@...r.kernel.org,
	davem@...emloft.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: netcp: remove call to netif_carrier_(on/off) for
 MAC to Phy interface

Hello.

On 4/23/2015 10:17 PM, Murali Karicheri wrote:

> Currently when interface type is MAC to Phy, netif_carrier_(on/off)
> is called which is not needed as Phy lib already updates the carrier
> status to net stack. This is needed only for other interface types

> Signed-off-by: Murali Karicheri <m-karicheri2@...com>
> ---
>   drivers/net/ethernet/ti/netcp_ethss.c |    8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)

> diff --git a/drivers/net/ethernet/ti/netcp_ethss.c b/drivers/net/ethernet/ti/netcp_ethss.c
> index 2bef655..0a1ef2e 100644
> --- a/drivers/net/ethernet/ti/netcp_ethss.c
> +++ b/drivers/net/ethernet/ti/netcp_ethss.c
> @@ -1765,7 +1765,9 @@ static void netcp_ethss_link_state_action(struct gbe_priv *gbe_dev,
>   				     ALE_PORT_STATE,
>   				     ALE_PORT_STATE_FORWARD);
>
> -		if (ndev && slave->open)
> +		if (ndev && slave->open &&
> +		    ((slave->link_interface != SGMII_LINK_MAC_PHY) &&
> +		    (slave->link_interface != XGMII_LINK_MAC_PHY)))

    You don't need extra parens around &&.

>   			netif_carrier_on(ndev);
>   	} else {
>   		writel(mac_control, GBE_REG_ADDR(slave, emac_regs,
> @@ -1773,7 +1775,9 @@ static void netcp_ethss_link_state_action(struct gbe_priv *gbe_dev,
>   		cpsw_ale_control_set(gbe_dev->ale, slave->port_num,
>   				     ALE_PORT_STATE,
>   				     ALE_PORT_STATE_DISABLE);
> -		if (ndev)
> +		if (ndev &&
> +		    ((slave->link_interface != SGMII_LINK_MAC_PHY) &&
> +		    (slave->link_interface != XGMII_LINK_MAC_PHY)))

    Likewise.

WBR, Sergei

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