linux-kernel - Re: [PATCH v2] ath5k: disable ASPM

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Date:	Sat, 19 Jun 2010 16:02:34 +0300
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	Bob Copeland <me@...copeland.com>
Cc:	Jussi Kivilinna <jussi.kivilinna@...et.fi>,
	ath5k-devel@...ts.ath5k.org, linux-wireless@...r.kernel.org,
	"Luis R. Rodriguez" <mcgrof@...badil.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] ath5k: disable ASPM

On Sat, 2010-06-19 at 08:38 -0400, Bob Copeland wrote: 
> On Sat, Jun 19, 2010 at 10:49:34AM +0300, Maxim Levitsky wrote:
> > How this patch?
> 
> Looks fine to me.  Some nitpicking below but feel free to add my
> 
> Acked-by: Bob Copeland <me@...copeland.com>
> 
> to this or a later version.
> 
> >     Signed-off-by: Jussi Kivilinna <jussi.kivilinna@...et.fi>
> >     Signed-off-by: Maxim Levitsky <maximlevitsky@...il.com>
> 
> I believe maintaining the s-o-b is usually reserved for the case when the
> patch only has minor edits; here your patch while same in spirit has
> some 30 fewer lines.  Maybe should use "From:" or mention Jussi in the
> commit log to maintain attribution instead?
OK


> 
> > +	/* Disable PCIE ASPM L0S. It is never enabled by windows driver */
> > +	pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
> > +
> 
> Would be good to expand this comment as to why (just copy another
> sentence from the commit log or so).
OK 
> 
> >  	ret = pci_enable_device(pdev);
> >  	if (ret) {
> >  		dev_err(&pdev->dev, "can't enable device\n");
> > @@ -722,6 +726,8 @@ static int ath5k_pci_resume(struct device *dev)
> >  	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
> >  	struct ath5k_softc *sc = hw->priv;
> >  
> > +	pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
> > +
> 
> Did you test that it did get lost over suspend/resume?  A glance at
> pci_save_pcie_state seems to indicate it's saved.
Will test.


Best regards,
Maxim Levitsky

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