linux-kernel - Re: Bug fix for pvrusb2 driver [was: Re: Kernel 2.6.26.5 -> 2.6.27.2 [USB REGRESSION] (USB -> D

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Date:	Thu, 23 Oct 2008 12:15:43 -0700
From:	Greg KH <greg@...ah.com>
To:	Mike Isely <isely@...ox.com>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Justin Piszcz <jpiszcz@...idpixels.com>,
	Oliver Neukum <oliver@...kum.org>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: Bug fix for pvrusb2 driver [was: Re: Kernel 2.6.26.5 ->
	2.6.27.2 [USB REGRESSION] (USB -> D_STATE)]

On Thu, Oct 23, 2008 at 11:27:11AM -0500, Mike Isely wrote:
> On Mon, 20 Oct 2008, Greg KH wrote:
> 
> > On Mon, Oct 20, 2008 at 11:37:41AM -0500, Mike Isely wrote:
> > > 
> > > I was incomplete in my previous response.  See further below for nack 
> > > and another patch...
> > > 
> > > 
> > > On Mon, 20 Oct 2008, Alan Stern wrote:
> > > 
> > >    [...]
> > > 
> > > > 
> > > > Index: usb-2.6/drivers/media/video/pvrusb2/pvrusb2-main.c
> > > > ===================================================================
> > > > --- usb-2.6.orig/drivers/media/video/pvrusb2/pvrusb2-main.c
> > > > +++ usb-2.6/drivers/media/video/pvrusb2/pvrusb2-main.c
> > > > @@ -68,6 +68,16 @@ static void pvr_setup_attach(struct pvr2
> > > >  #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */
> > > >  }
> > > >  
> > > > +static int pvr_pre_reset(struct usb_interface *intf)
> > > > +{
> > > > +	return 0;
> > > > +}
> > > > +
> > > > +static int pvr_post_reset(struct usb_interface *intf)
> > > > +{
> > > > +	return 0;
> > > > +}
> > > > +
> > > >  static int pvr_probe(struct usb_interface *intf,
> > > >  		     const struct usb_device_id *devid)
> > > >  {
> > > > @@ -109,7 +119,9 @@ static struct usb_driver pvr_driver = {
> > > >  	.name =         "pvrusb2",
> > > >  	.id_table =     pvr2_device_table,
> > > >  	.probe =        pvr_probe,
> > > > -	.disconnect =   pvr_disconnect
> > > > +	.disconnect =   pvr_disconnect,
> > > > +	.pre_reset =	pvr_pre_reset,
> > > > +	.post_reset =	pvr_post_reset,
> > > >  };
> > > >  
> > > >  /*
> > > > 
> > > > --
> > > > To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> > > > the body of a message to majordomo@...r.kernel.org
> > > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > > > 
> > > 
> > > Nacked-by: Mike Isely <isely@...ox.com>
> > > 
> > > There is already another patch ready to go which eliminates the reset 
> > > entirely.  It can be found here:
> > > 
> > > http://linuxtv.org/hg/~mcisely/pvrusb2/rev/0bb411d8d2e4
> > 
> > Will this patch be sent to the -stable group, to fix this regression in
> > 2.6.27?  Or should they take Alan's fix instead?
> > 
> 
> Greg:
> 
> I didn't directly answer your question here because I had figured it was 
> answered in a previous post on this thread, that Mike Krufky had already 
> explicitly asked that it be queued (and added his Reviewed-By tag), and 
> that I figured it best not to add yet more noise to an already noisy 
> group.
> 
> However now I see that this patch didn't get into 2.6.27.3.  It's a 
> pretty important fix; without it the pvrusb2 driver is worse than 
> useless (unless one adds initusbreset=0 as a module option).

As we were discussing this on Monday, and the review cycle for 2.6.27.3
started last Saturday, it would have been pretty hard to get it into
2.6.27.3 :)

I need to see the patch in Linus's tree first, before it can go into any
stable release.  Is it in there yet?  If so, please send me the git
commit id and I'll queue it up for the next -stable round.

thanks,

greg k-h
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