linux-kernel - Re: [PATCH] macb: Fix speed setting

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Message-ID: <20080221151246.6f2044b9@dhcp-252-066.norway.atmel.com>
Date:	Thu, 21 Feb 2008 15:12:46 +0100
From:	Haavard Skinnemoen <hskinnemoen@...el.com>
To:	Atsushi Nemoto <anemo@....ocn.ne.jp>
Cc:	Jeff Garzik <jeff@...zik.org>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] macb: Fix speed setting

On Thu, 21 Feb 2008 22:50:54 +0900 (JST)
Atsushi Nemoto <anemo@....ocn.ne.jp> wrote:

> Fix NCFGR.SPD setting on 10Mbps.  This bug was introduced by
> conversion to generic PHY layer in kernel 2.6.23.
> 
> Signed-off-by: Atsushi Nemoto <anemo@....ocn.ne.jp>
> ---
> diff --git a/drivers/net/macb.c b/drivers/net/macb.c
> index 81bf005..1d210ed 100644
> --- a/drivers/net/macb.c
> +++ b/drivers/net/macb.c
> @@ -148,7 +148,7 @@ static void macb_handle_link_change(struct net_device *dev)
>  
>  			if (phydev->duplex)
>  				reg |= MACB_BIT(FD);
> -			if (phydev->speed)
> +			if (phydev->speed == SPEED_100)

I have to admit that even after looking through include/linux/phy.h and
include/linux/mii.h, I don't have the faintest idea what values we can
expect to find in the "speed" field of phydev. The comment above struct
phy_device says that it is used "like in mii_if_info", but struct
mii_if_info doesn't have a "speed" field...

I'm willing to take your word for it, but some documentation would be
really nice...

Haavard
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