netdev - Re: [PATCH v2] net: fec: Fix the disabling of RX interrupt

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Message-ID: <CAOMZO5DBuswBA92s4gRLiRO9ZyX7mmd+27-4619ms322Rirrow@mail.gmail.com>
Date:	Tue, 19 Feb 2013 00:19:09 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Frank Li <lznuaa@...il.com>
Cc:	Fabio Estevam <fabio.estevam@...escale.com>, davem@...emloft.net,
	Frank.Li@...escale.com, shawn.guo@...aro.org, marex@...x.de,
	s.hauer@...gutronix.de, netdev@...r.kernel.org
Subject: Re: [PATCH v2] net: fec: Fix the disabling of RX interrupt

On Mon, Feb 18, 2013 at 11:47 PM, Frank Li <lznuaa@...il.com> wrote:

> This is similar with my first implement.

I checked your original implementation and
spin_lock_irqsave/spin_unlock_irqrestore was very far apart.

> It just protect irq and init function. Many place write FEC_IMASK directly.

Yes, but the main issue with current code is that it does not clear
the only rx irq as it should.

> I think this issue was caused by enable irq before register irq handler.
> writel(0, fep->hwp + FEC_IMASK) should fix mx53's problem.

No, it does not solve the issue.

I don't have a mx6q board handy. If you could try this patch and let
me know if you see any deadlock, it would be nice.

Thanks,

Fabio Estevam
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