linux-kernel - Re: [PATCH v3 3/4] ASoC: fsl_ssi: Add dual fifo mode support

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Date:	Thu, 31 Oct 2013 07:04:29 -0500
From:	Timur Tabi <timur@...i.org>
To:	Nicolin Chen <b42378@...escale.com>, s.hauer@...gutronix.de,
	shawn.guo@...aro.org, broonie@...nel.org
CC:	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	dmaengine@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	alsa-devel@...a-project.org, rob.herring@...xeda.com,
	mark.rutland@....com, swarren@...dotorg.org, pawel.moll@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	philippe.retornaz@...il.com
Subject: Re: [PATCH v3 3/4] ASoC: fsl_ssi: Add dual fifo mode support

Nicolin Chen wrote:
> +	if (ssi_private->use_dual_fifo) {
> +		write_ssi_mask(&ssi->srcr, 0, CCSR_SSI_SRCR_RFEN1);
> +		write_ssi_mask(&ssi->stcr, 0, CCSR_SSI_STCR_TFEN1);
> +		write_ssi_mask(&ssi->scr, 0, CCSR_SSI_SCR_TCH_EN);
> +	} else {
> +		write_ssi_mask(&ssi->srcr, CCSR_SSI_SRCR_RFEN1, 0);
> +		write_ssi_mask(&ssi->stcr, CCSR_SSI_STCR_TFEN1, 0);
> +		write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_TCH_EN, 0);
> +	}

Why do you need the "else" part?  Why can't you just do this:

if (ssi_private->use_dual_fifo) {
	write_ssi_mask(&ssi->srcr, 0, CCSR_SSI_SRCR_RFEN1);
	write_ssi_mask(&ssi->stcr, 0, CCSR_SSI_STCR_TFEN1);
	write_ssi_mask(&ssi->scr, 0, CCSR_SSI_SCR_TCH_EN);
}
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