netdev - Re: [PATCH 1/1] net: fec: fix miss init spinlock

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Message-ID: <loom.20130221T185110-574@post.gmane.org>
Date:	Thu, 21 Feb 2013 17:59:23 +0000 (UTC)
From:	Jim Baxter <jim_baxter@...tor.com>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH 1/1] net: fec: fix miss init spinlock

Fabio Estevam <festevam <at> gmail.com> writes:

> 
> On Thu, Feb 21, 2013 at 2:07 PM, Jim Baxter <jim_baxter <at> mentor.com> wrote:
> > Is the general issue in this driver that the fec_probe function:
> > request_irq(irq, fec_enet_interrupt, IRQF_DISABLED, pdev->name, ndev);
> >
> > is called before fec_ptp_init() and fec_enet_init() have been called so that
> > there is a chance the fec_enet_interrupt can occur before the hardware and 
data
> > structures are fully setup?
> 
> The scenario you described is fixed by the patch that Frank proposed at:
> http://patchwork.ozlabs.org/patch/222164/
> 

That is a good patch that will stop interrupts occurring before request_irq is 
called.

What about the problem of fec_enet_interrupt calling fec_ptp_start_cyclecounter 
before fec_ptp_init has been called?

Should fec_enet_init and fec_ptp_init be setup before the request_irq is called?

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