linux-kernel - Re: [PATCH] ASoC: fsl_sai: Add isr to deal with error flag

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Message-ID: <20140327011424.GB30768@sirena.org.uk>
Date:	Thu, 27 Mar 2014 01:14:24 +0000
From:	Mark Brown <broonie@...nel.org>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	'Nicolin Chen' <Guangyu.Chen@...escale.com>,
	"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: fsl_sai: Add isr to deal with error flag

On Wed, Mar 26, 2014 at 11:59:53AM +0000, David Laight wrote:
> From: Nicolin Chen

> > +	regmap_read(sai->regmap, FSL_SAI_TCSR, &xcsr);
> > +	regmap_write(sai->regmap, FSL_SAI_TCSR, xcsr);

> Assuming these are 'write to clear' bits, you might want
> to make the write (above) and all the traces (below)
> conditional on the value being non-zero.

The trace is already conditional?  I'd also expect to see the driver
only acknowledging sources it knows about and only reporting that the
interrupt was handled if it saw one of them - right now all interrupts
are unconditionally acknowleged.

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