netdev - Re: [PATCH v3 1/1 net-next] net: fec: put tx to napi poll function to fix dead lock

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Date:	Sun, 24 Mar 2013 22:35:28 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	Fabio Estevam <festevam@...il.com>
CC:	Frank Li <Frank.Li@...escale.com>, <B38611@...escale.com>,
	<netdev@...r.kernel.org>, <s.hauer@...gutronix.de>,
	<lznuaa@...il.com>, <davem@...emloft.net>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 1/1 net-next] net: fec: put tx to napi poll function
 to fix dead lock

On Fri, Mar 22, 2013 at 04:00:26PM -0300, Fabio Estevam wrote:
> On Wed, Mar 20, 2013 at 8:48 AM, Shawn Guo <shawn.guo@...aro.org> wrote:
> > Frank,
> >
> > I'm running v3.9-rc3 image with NFS on imx6q, and seeing system fail
> > to resume back.  The resume seems being stopped by fec driver.  If you
> > wait long enough, you might see the repeated "eth0: tx queue full!."
> > error message.
> 
> On mx28, only reverting this patch does not solve the suspend/resume issue.

Are you sure?  After reverting the patch on next-20130322, I can get
imx28 resume back to console as below.

Shawn

root@...escale ~$ echo mem > /sys/power/state
[   20.943170] PM: Syncing filesystems ... done.
[   20.976303] Freezing user space processes ... (elapsed 0.01 seconds) done.
[   20.998050] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
[   21.025647] PM: suspend of devices complete after 6.283 msecs
[   21.032543] PM: late suspend of devices complete after 1.092 msecs
[   21.040489] PM: noirq suspend of devices complete after 1.603 msecs
[   21.048045] PM: noirq resume of devices complete after 0.794 msecs
[   21.055891] PM: early resume of devices complete after 1.088 msecs
[   21.167790] PM: resume of devices complete after 105.641 msecs
[   21.174939] Restarting tasks ... done.
root@...escale ~$

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