linux-kernel - Re: [PATCH 03/14] soundwire: Add Master registration

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Date:   Fri, 20 Oct 2017 21:35:56 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        ALSA <alsa-devel@...a-project.org>, Mark <broonie@...nel.org>,
        Takashi <tiwai@...e.de>,
        Pierre <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        Shreyas NC <shreyas.nc@...el.com>, patches.audio@...el.com,
        alan@...ux.intel.com,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Sagar Dharia <sdharia@...eaurora.org>,
        srinivas.kandagatla@...aro.org, plai@...eaurora.org,
        Sudheer Papothi <spapothi@...eaurora.org>
Subject: Re: [PATCH 03/14] soundwire: Add Master registration

On Fri, Oct 20, 2017 at 12:47:26PM +0200, Greg Kroah-Hartman wrote:
> On Thu, Oct 19, 2017 at 08:33:19AM +0530, Vinod Koul wrote:
> > +void sdw_extract_slave_id(struct sdw_bus *bus,
> > +			unsigned long long addr, struct sdw_slave_id *id)
> > +{
> > +	dev_dbg(bus->dev, "SDW Slave Addr: %llx", addr);
> > +
> > +	/*
> > +	 * Spec definition
> > +	 *   Register		Bit	Contents
> > +	 *   DevId_0 [7:4]	47:44	sdw_version
> > +	 *   DevId_0 [3:0]	43:40	unique_id
> > +	 *   DevId_1		39:32	mfg_id [15:8]
> > +	 *   DevId_2		31:24	mfg_id [7:0]
> > +	 *   DevId_3		23:16	part_id [15:8]
> > +	 *   DevId_4		15:08	part_id [7:0]
> > +	 *   DevId_5		07:00	class_id
> > +	 */
> > +	id->sdw_version = (addr >> 44) & GENMASK(3, 0);
> > +	id->unique_id = (addr >> 40) & GENMASK(3, 0);
> > +	id->mfg_id = (addr >> 24) & GENMASK(15, 0);
> > +	id->part_id = (addr >> 8) & GENMASK(15, 0);
> > +	id->class_id = addr & GENMASK(7, 0);
> > +
> > +	dev_info(bus->dev,
> > +		"SDW Slave class_id %x, part_id %x, mfg_id %x, unique_id %x, version %x",
> > +				id->class_id, id->part_id, id->mfg_id,
> > +				id->unique_id, id->sdw_version);
> > +
> 
> Why are you so noisy?  Shouldn't this be dev_dbg()?

Sure, Takashi had same comment so this is fixed.

> > +static void sdw_slave_release(struct device *dev)
> > +{
> > +	struct sdw_slave *slave = dev_to_sdw_dev(dev);
> > +
> > +	kfree(slave);
> > +}
> 
> Ah, finally a release function, nice.  But that's all you need to do for
> it?

The only pending thing is to release the memory. The bus reference and
related cleanup is done when device is unregistered.

-- 
~Vinod