linux-kernel - Re: [PATCH] soundwire: intel: move to auxiliary bus

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Message-ID: <YFmatyAoMZmBmkuZ@kroah.com>
Date:   Tue, 23 Mar 2021 08:37:27 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Bard Liao <yung-chuan.liao@...ux.intel.com>
Cc:     alsa-devel@...a-project.org, vkoul@...nel.org,
        vinod.koul@...aro.org, linux-kernel@...r.kernel.org,
        srinivas.kandagatla@...aro.org, rander.wang@...ux.intel.com,
        hui.wang@...onical.com, pierre-louis.bossart@...ux.intel.com,
        sanyog.r.kale@...el.com, bard.liao@...el.com
Subject: Re: [PATCH] soundwire: intel: move to auxiliary bus

On Tue, Mar 23, 2021 at 08:43:25AM +0800, Bard Liao wrote:
> From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> 
> Now that the auxiliary_bus exists, there's no reason to use platform
> devices as children of a PCI device any longer.
> 
> This patch refactors the code by extending a basic auxiliary device
> with Intel link-specific structures that need to be passed between
> controller and link levels. This refactoring is much cleaner with no
> need for cross-pointers between device and link structures.
> 
> Note that the auxiliary bus API has separate init and add steps, which
> requires more attention in the error unwinding paths. The main loop
> needs to deal with kfree() and auxiliary_device_uninit() for the
> current iteration before jumping to the common label which releases
> everything allocated in prior iterations.

The init/add steps can be moved together in the aux bus code if that
makes this usage simpler.  Please do that instead.

thanks,

greg k-h