linux-kernel - Re: [PATCH 3/5] ASoC: dwc: Iterate over all channels

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <54802355.4070500@arm.com>
Date:	Thu, 04 Dec 2014 09:03:17 +0000
From:	Andrew Jackson <Andrew.Jackson@....com>
To:	Mark Brown <broonie@...nel.org>
CC:	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rajeev Kumar <rajeevkumar.linux@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Liviu Dudau <Liviu.Dudau@....com>
Subject: Re: [PATCH 3/5] ASoC: dwc: Iterate over all channels

On 12/03/14 17:29, Mark Brown wrote:
> On Wed, Dec 03, 2014 at 04:39:01PM +0000, Andrew Jackson wrote:
> 
>> +	/* Iterate over set of channels - independently controlled.
>> +	 */
>> +	do {
>> +		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
>> +			i2s_write_reg(dev->i2s_base, TCR(ch_reg),
>> +				      xfer_resolution);
>> +			i2s_write_reg(dev->i2s_base, TFCR(ch_reg), 0x02);
>> +			irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg));
>> +			i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x30);
>> +			i2s_write_reg(dev->i2s_base, TER(ch_reg), 1);
>> +		} else {
>> +			i2s_write_reg(dev->i2s_base, RCR(ch_reg),
>> +				      xfer_resolution);
>> +			i2s_write_reg(dev->i2s_base, RFCR(ch_reg), 0x07);
>> +			irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg));
>> +			i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x03);
>> +			i2s_write_reg(dev->i2s_base, RER(ch_reg), 1);
>> +		}
>> +	} while (ch_reg-- > 0);
> 
> The normal way to write an iteration would be with a for loop - why are
> we not doing that?

The intention was to minimise the changes, excluding whitespace, between this version and the original.  Also, it is a perfectly valid looping construct.  I'm happy to rework it into a for loop.

> Also I see that you've not sent these as a single thread - please use
> --thread.
> 

	Andrew
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/