netdev - Re: [Bugme-new] [Bug 9721] New: wake on lan fails with sky2 module

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Date:	Sun, 13 Jan 2008 12:57:08 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	supersud501 <supersud501@...oo.de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	netdev@...r.kernel.org, linux-acpi@...r.kernel.org,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bugme-new] [Bug 9721] New: wake on lan fails with sky2 module

On Sun, 13 Jan 2008 21:27:40 +0100 supersud501 <supersud501@...oo.de> wrote:

> 
> 
> Andrew Morton wrote:
> > 
> > So simply reverting this:
> > 
> > commit ac93a3946b676025fa55356180e8321639744b31
> > Author: Stephen Hemminger <shemminger@...ux-foundation.org>
> > Date:   Mon Nov 5 15:52:08 2007 -0800
> > 
> >     sky2: enable PCI config writes
> >     
> >     On some boards, PCI configuration space access is turned off by default.
> >     The 2.6.24 driver doesn't turn it on, and should have.
> >     
> >     Signed-off-by: Stephen Hemminger <shemminger@...ux-foundation.org>
> >     Signed-off-by: Jeff Garzik <jeff@...zik.org>
> > 
> > diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
> > index c27c7d6..4f41a94 100644
> > --- a/drivers/net/sky2.c
> > +++ b/drivers/net/sky2.c
> > @@ -2791,6 +2791,9 @@ static void sky2_reset(struct sky2_hw *hw)
> >  	sky2_write8(hw, B0_CTST, CS_RST_SET);
> >  	sky2_write8(hw, B0_CTST, CS_RST_CLR);
> >  
> > +	/* allow writes to PCI config */
> > +	sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
> > +
> >  	/* clear PCI errors, if any */
> >  	pci_read_config_word(pdev, PCI_STATUS, &status);
> >  	status |= PCI_STATUS_ERROR_BITS;
> > 
> > fixes this regression?
> > 
> > If so, we should revert that change.
> > 
> 
> 
> yes, it does.
> 

OK, thanks.  I queued up the revert and shall wait to hear from
Stephen/David/Jeff on this.

> 
> >> but i noticed another "bug" on 2.6.24-rc7-git with sky2: dmesg shows a 
> >> lot of lines every 5 seconds:
> >>
> >> [...]
> >> [  357.400462] sky2 0000:02:00.0: error interrupt status=0xc0000000
> >> [  362.442039] printk: 41 messages suppressed.
> >> [  362.442043] sky2 0000:02:00.0: error interrupt status=0x80000000
> >> [  367.439151] printk: 18 messages suppressed.
> >> [  367.439156] sky2 0000:02:00.0: error interrupt status=0x80000000
> >> [  372.436267] printk: 30 messages suppressed.
> >> [  372.436271] sky2 0000:02:00.0: error interrupt status=0x80000000
> >> [  377.350236] printk: 19 messages suppressed.
> >> [...]
> >>
> >> since i do not notice any errors (yet) i'll wait till next rc, maybe it 
> >> will be gone then...
> > 
> > That's not good.  is this new behaviour?
> > 
> > 
> 
> at least on 2.6.23.12 i doesn't happen, so it's now for me in 
> 2.6.24-rc7-git4 (but again, not testet in earlier versions of 2.6.24).
> 
> since i do not feel any sideeffects yet after using it for ~6 hours 
> (besides a really long dmesg-output), it's just a little bit annoying.
> 
> if there's a way to identify the source of the problem besides of 
> bisecting, just say so and i will take a look into it the next days. if 
> bisecting is the only (time-consuming) way you have to wait at least 
> until the next weekend :)

2.6.23 also has this warning in sky2_err_intr() but it doesn't trigger
there.  Rafael, I think we'd have to class this as a post-2.6.23
regression.


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