netdev - Re: [PATCH] sky2: Fix suspend/hibernation/shutdown regression with WOL enabled

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Message-ID: <20080809235711.12c2f331@extreme>
Date:	Sat, 9 Aug 2008 23:57:11 -0700
From:	Stephen Hemminger <stephen.hemminger@...tta.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	netdev@...r.kernel.org, Jeff Garzik <jeff@...zik.org>,
	Stephen Hemminger <shemminger@...tta.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sky2: Fix suspend/hibernation/shutdown regression with
 WOL enabled

On Sat, 9 Aug 2008 23:32:28 +0200
"Rafael J. Wysocki" <rjw@...k.pl> wrote:

> sky2: Fix suspend/hibernation/shutdown regression with WOL enabled
> 
> On my test box with the Asus M3A32-MVP main board there is a
> regression from 2.6.26 related to suspend, hibernation and
> shutdown.  Namely, if Wake-on-LAN is enabled with
> 'ethtool -s eth0 wol g', the box hangs solid during all of these
> operations, while executing either sky2_suspend(), or
> sky2_shutdown().  This patch fixes it for me.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> ---
>  drivers/net/sky2.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> Index: linux-2.6/drivers/net/sky2.c
> ===================================================================
> --- linux-2.6.orig/drivers/net/sky2.c
> +++ linux-2.6/drivers/net/sky2.c
> @@ -665,7 +665,8 @@ static void sky2_phy_power_down(struct s
>  		    GM_GPCR_FL_PASS | GM_GPCR_SPEED_100 | GM_GPCR_AU_ALL_DIS);
>  
>  	if (hw->chip_id != CHIP_ID_YUKON_EC) {
> -		if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
> +		if (hw->chip_id == CHIP_ID_YUKON_EC_U
> +		    && hw->chip_rev != CHIP_REV_YU_EC_U_B0) {
>  			ctrl = gm_phy_read(hw, port, PHY_MARV_PHY_CTRL);
>  
>  			/* enable Power Down */

The problem is not unique to your chip version, so patching out
the power down is not the correct solution.
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