netdev - Re: [PATCH 1/1] Revert "net: fec: Ensure clocks are enabled while using mdio bus"

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Date:	Fri, 14 Aug 2015 16:14:45 +0800
From:	Peter Chen <peter.chen@...escale.com>
To:	Lucas Stach <l.stach@...gutronix.de>
CC:	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Duan Andy <fugang.duan@...escale.com>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>,
	Fabio Estevam <Fabio.Estevam@...escale.com>,
	"tyler.baker@...aro.org" <tyler.baker@...aro.org>,
	Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH 1/1] Revert "net: fec: Ensure clocks are enabled while
 using mdio bus"

On Fri, Aug 14, 2015 at 10:27:33AM +0200, Lucas Stach wrote:
> Am Freitag, den 14.08.2015, 08:25 +0000 schrieb Peter Chen:
> >  
> > > 
> > > Am Freitag, den 14.08.2015, 13:47 +0800 schrieb Peter Chen:
> > > > It causes the i.mx6sx sdb board hang when using nfsroot during boots
> > > > up at v4.2-rc6.
> > > >
> > > > This reverts commit 8fff755e9f8d0f70a595e79f248695ce6aef5cc3.
> > > >
> > > > Cc: netdev@...r.kernel.org
> > > > Cc: Fugang Duan <B38611@...escale.com>
> > > > Cc: shawn.guo@...aro.org
> > > > Cc: fabio.estevam@...escale.com
> > > > Cc: tyler.baker@...aro.org
> > > > Cc: Lucas Stach <l.stach@...gutronix.de>
> > > > Cc: Andrew Lunn <andrew@...n.ch>
> > > > Signed-off-by: Peter Chen <peter.chen@...escale.com>
> > > > ---
> > > >
> > > > According to Fugang Duan, the i.mx series has different clock control
> > > > sequence among SoCs, this patch may only consider certain SoCs.
> > > >
> > > Sorry, but NACK.
> > > 
> > > Please test current mainline (what will become v4.2-rc7). There is already a
> > > patch in that fixes i.MX27 and probably fixes the same problem on i.MX6SX.
> > > 
> > 
> > Would you help point to me which commit and at which tree?
> > 
> Mainline, so Linus Torvalds tree.
> 
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=14d2b7c1a96ef37eb571599c73d4a1a606b964d6

It fixes my imx6sx-sdb board. It is interesting that there was
no problem for some platforms, but with problem for others.
Your fix is a common runtime PM fix.

Again, why we need this as a bug-fix, not but as new feature for next
rc1?

-- 

Best Regards,
Peter Chen
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