RE: [PATCH] usb: chipidea: udc: assign interrupt number to USB gadget structure

[Jun Li <jun.li@nxp.com>]

> -----Original Message-----
> From: Jun Li
> Sent: Friday, June 4, 2021 7:10 PM
> To: Greg KH <gregkh@linuxfoundation.org>
> Cc: peter.chen@kernel.org; linux-usb@vger.kernel.org; dl-linux-imx
> <linux-imx@nxp.com>; Faqiang Zhu <faqiang.zhu@nxp.com>
> Subject: RE: [PATCH] usb: chipidea: udc: assign interrupt number to USB gadget
> structure
> 
> > -----Original Message-----
> > From: Greg KH <gregkh@linuxfoundation.org>
> > Sent: Friday, June 4, 2021 6:52 PM
> > To: Jun Li <jun.li@nxp.com>
> > Cc: peter.chen@kernel.org; linux-usb@vger.kernel.org; dl-linux-imx
> > <linux-imx@nxp.com>; Faqiang Zhu <faqiang.zhu@nxp.com>
> > Subject: Re: [PATCH] usb: chipidea: udc: assign interrupt number to
> > USB gadget structure
> >
> > On Fri, May 14, 2021 at 06:59:44PM +0800, Li Jun wrote:
> > > Chipidea also need sync interrupt before unbind the udc while gadget
> > > remove driver, otherwise setup irq handling may happen while unbind,
> > > see below dump generated from android function switch stress test:
> > >
> ...
> > >
> >
> > What commit does this fix?  Should it go to stable kernels, and if so,
> > how far back?
> 
> I will resend the patch with fix tag added.

Hi Greg,

I assume this problem may exist all along or very far, but this patch
need base one commit[1] to fix this problem, so I think that commit is
the point to know how far this patch can apply back for stable kernels,
in this case, please let me know if adding fix tag pointing to that commit
still the right way for this.

[1] 3c73bc52195d ("usb: gadget: core: sync interrupt before unbind the udc")

thanks
Li Jun

> 
> Li Jun
> >
> > thanks,
> >
> > greg k-h