linux-kernel - Re: [PATCH v2 1/6] sysfs: do not create empty directories if no attributes are present

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Date:   Thu, 25 Aug 2022 09:52:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc:     alsa-devel@...a-project.org, Vinod Koul <vkoul@...nel.org>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/6] sysfs: do not create empty directories if no
 attributes are present

On Wed, Aug 24, 2022 at 05:22:37PM +0200, Greg Kroah-Hartman wrote:
> On Wed, Aug 24, 2022 at 05:17:44PM +0200, Pierre-Louis Bossart wrote:
> > 
> > 
> > On 8/24/22 15:59, Greg Kroah-Hartman wrote:
> > > When creating an attribute group, if it is named a subdirectory is
> > > created and the sysfs files are placed into that subdirectory.  If no
> > > files are created, normally the directory would still be present, but it
> > > would be empty.  Clean this up by removing the directory if no files
> > > were successfully created in the group at all.
> > > 
> > > Cc: Vinod Koul <vkoul@...nel.org>
> > > Cc: Bard Liao <yung-chuan.liao@...ux.intel.com>
> > > Cc: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> > > Cc: Sanyog Kale <sanyog.r.kale@...el.com>
> > > Cc: alsa-devel@...a-project.org
> > > Cc: linux-kernel@...r.kernel.org
> > > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > > ---
> > > v2: new patch
> > > 
> > > Note, totally untested!  The following soundwire patches will need this,
> > > if a soundwire developer could test this out, it would be most
> > > apreciated.
> > 
> > Not able to see the kernel boot with this first patch. The device is
> > stuck with the cursor not even blinking. It seems our CI test devices
> > are also stuck.
> > 
> > This is completely beyond my comfort zone but I can run more tests to
> > root cause this.
> 
> Ick, ok, so much for sending out untested patches :(
> 
> I'll test and debug this tomorrow and resend a correct version, thanks
> for helping out here, sorry it didn't work.

I have run out of time to work on this for this week, I'll try to pick
it up next week.  Don't worry about the soundwire changes for now, I'll
resend them when I get this all working properly.

thanks,

greg k-h