linux-kernel - Re: [PATCH 5.4 65/90] Input: aiptek - use descriptors of current altsetting

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Message-ID: <20200204100332.GC1088789@kroah.com>
Date:   Tue, 4 Feb 2020 10:03:32 +0000
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Vladis Dronov <vdronov@...hat.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 5.4 65/90] Input: aiptek - use descriptors of current
 altsetting

On Tue, Feb 04, 2020 at 09:11:55AM +0100, Johan Hovold wrote:
> On Mon, Feb 03, 2020 at 04:20:08PM +0000, Greg Kroah-Hartman wrote:
> > From: Johan Hovold <johan@...nel.org>
> > 
> > [ Upstream commit cfa4f6a99fb183742cace65ec551b444852b8ef6 ]
> > 
> > Make sure to always use the descriptors of the current alternate setting
> > to avoid future issues when accessing fields that may differ between
> > settings.
> > 
> > Signed-off-by: Johan Hovold <johan@...nel.org>
> > Acked-by: Vladis Dronov <vdronov@...hat.com>
> > Link: https://lore.kernel.org/r/20191210113737.4016-4-johan@kernel.org
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> > Signed-off-by: Sasha Levin <sashal@...nel.org>
> > ---
> >  drivers/input/tablet/aiptek.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
> > index 06d0ffef4a171..e08b0ef078e81 100644
> > --- a/drivers/input/tablet/aiptek.c
> > +++ b/drivers/input/tablet/aiptek.c
> > @@ -1713,7 +1713,7 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
> >  
> >  	aiptek->inputdev = inputdev;
> >  	aiptek->intf = intf;
> > -	aiptek->ifnum = intf->altsetting[0].desc.bInterfaceNumber;
> > +	aiptek->ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
> >  	aiptek->inDelay = 0;
> >  	aiptek->endDelay = 0;
> >  	aiptek->previousJitterable = 0;
> 
> I asked Sasha to drop this one directly when he added it, so it's
> probable gone from all the stable queues by now.

Oops, no, let me go drop it.

> But I'm still curious how this ended up being selected for stable in the
> first place? There's no fixes or stable tag in the commit, and I never
> received a mail from the AUTOSEL scripts.

I don't know, there was a bunch of last-minute patches picked up for
this round based on some "fixes needed due to other fixes".

thanks,

greg k-h