linux-kernel - Re: [PATCH 07/10] macb: Basic suspend/resume support

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Date:	Thu, 13 Mar 2008 21:28:20 +0100
From:	Haavard Skinnemoen <haavard.skinnemoen@...el.com>
To:	David Brownell <david-b@...bell.net>
Cc:	kernel@...32linux.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/10] macb: Basic suspend/resume support

On Thu, 13 Mar 2008 12:18:56 -0800
David Brownell <david-b@...bell.net> wrote:

> On Thursday 13 March 2008, Haavard Skinnemoen wrote:
> > ---
> >  drivers/net/macb.c |   37 +++++++++++++++++++++++++++++++++++++
> >  1 files changed, 37 insertions(+), 0 deletions(-)  
> 
> Shouldn't this look more like the suspend/resume support
> in drivers/net/arm/at91_ether.c ?  I don't see calls to
> netif_stop_queue()/netif_start_queue(), among other things.

Could be, although netif_stop_queue()/netif_start_queue() is done by
netif_device_detach() and netif_device_attach() respectively.

We should probably shut things down gracefully as well...not nice to
disable the clock when the MAC is in the middle of transmitting a
frame. Like I said in the introductory mail, this patch is just a quick
hack to prevent the macb from waking the system prematurely.

> The fact that this driver leaves the peripheral clocked
> when it's not open is a minor PM goof; ditto not using
> the PHY irq to track connect/disconnect.  But that's just
> general PM stuff, not specific to suspend/resume support.

Right, it's on my todo list.

Haavard
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