Re: [PATCH v2] usb: gadget: function: fix missing spinlock in f_uac1_legacy

[Greg KH]

On Sun, Jul 05, 2020 at 02:16:16PM +0800, qiang.zhang@xxxxxxxxxxxxx wrote:
> From: Zhang Qiang <qiang.zhang@xxxxxxxxxxxxx>
> 
> Add a missing spinlock protection to the add operation of the "audio->play_queue"
> in "f_audio_out_ep_complete" function.

That says _what_ you did, but not _why_ you did that.  Why is a lock
needed here?  What does this protect?

What kernel commit does this "fix"?  Put that in the "Fixes:" line, and
probably you need a "cc: stable" in that area too, right?

thanks,

greg k-h