linux-kernel - Re: [PATCH 1/1] usb: gadget: f_hid: Conduct proper refcounting on shared f

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Date:   Thu, 17 Nov 2022 13:26:21 +0000
From:   Lee Jones <lee@...nel.org>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     balbi@...nel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH 1/1] usb: gadget: f_hid: Conduct proper refcounting on
 shared f_hidg pointer

On Thu, 17 Nov 2022, Greg KH wrote:

> On Thu, Nov 17, 2022 at 12:08:13PM +0000, Lee Jones wrote:
> > A reference to struct f_hidg is shared with this driver's associated
> > character device handling component without provision for life-time
> > handling.  In some circumstances, this can lead to unwanted
> > behaviour depending on the order in which things are torn down.
> > 
> > Utilise, the reference counting functionality already provided by the
> > implanted character device structure to ensure the struct f_hidg's
> > memory is only freed once the character device handling has finished
> > with it.
> > 
> > Signed-off-by: Lee Jones <lee@...nel.org>
> > ---
> >  drivers/usb/gadget/function/f_hid.c | 47 +++++++++++++++++++++++------
> >  1 file changed, 37 insertions(+), 10 deletions(-)
> 
> Hi,
> 
> This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
> a patch that has triggered this response.  He used to manually respond
> to these common problems, but in order to save his sanity (he kept
> writing the same thing over and over, yet to different people), I was
> created.  Hopefully you will not take offence and will fix the problem
> in your patch and resubmit it so that it can be accepted into the Linux
> kernel tree.
> 
> You are receiving this message because of the following common error(s)
> as indicated below:
> 
> - This looks like a new version of a previously submitted patch, but you
>   did not list below the --- line any changes from the previous version.
>   Please read the section entitled "The canonical patch format" in the
>   kernel file, Documentation/SubmittingPatches for what needs to be done
>   here to properly describe this.
> 
> If you wish to discuss this problem further, or you have questions about
> how to resolve this issue, please feel free to respond to this email and
> Greg will reply once he has dug out from the pending patches received
> from other developers.
> 
> thanks,
> 
> greg k-h's patch email bot

This is a completely new solution to the same problem.

I'm treating this as a brand new submission.

-- 
Lee Jones [李琼斯]