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

[Greg Kroah-Hartman]

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 at kernel.org>
> > Cc: Bard Liao <yung-chuan.liao at linux.intel.com>
> > Cc: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
> > Cc: Sanyog Kale <sanyog.r.kale at intel.com>
> > Cc: alsa-devel at alsa-project.org
> > Cc: linux-kernel at vger.kernel.org
> > Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.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.

greg k-h