linux-kernel - Re: [PATCH AUTOSEL 5.8 55/62] RDMA/efa: Add EFA 0xefa1 PCI ID

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Date:   Fri, 21 Aug 2020 17:19:52 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Sasha Levin <sashal@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>,
        Gal Pressman <galpress@...zon.com>,
        Shadi Ammouri <sammouri@...zon.com>,
        Yossi Leybovich <sleybo@...zon.com>,
        <linux-rdma@...r.kernel.org>
Subject: Re: [PATCH AUTOSEL 5.8 55/62] RDMA/efa: Add EFA 0xefa1 PCI ID

On Fri, Aug 21, 2020 at 03:53:22PM -0400, Sasha Levin wrote:
> On Fri, Aug 21, 2020 at 04:40:36PM -0300, Jason Gunthorpe wrote:
> > On Fri, Aug 21, 2020 at 12:14:16PM -0400, Sasha Levin wrote:
> > > From: Gal Pressman <galpress@...zon.com>
> > > 
> > > [ Upstream commit d4f9cb5c5b224dca3ff752c1bb854250bf114944 ]
> > > 
> > > Add support for 0xefa1 devices.
> > > 
> > > Link: https://lore.kernel.org/r/20200722140312.3651-5-galpress@amazon.com
> > > Reviewed-by: Shadi Ammouri <sammouri@...zon.com>
> > > Reviewed-by: Yossi Leybovich <sleybo@...zon.com>
> > > Signed-off-by: Gal Pressman <galpress@...zon.com>
> > > Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
> > > Signed-off-by: Sasha Levin <sashal@...nel.org>
> > >  drivers/infiniband/hw/efa/efa_main.c | 6 ++++--
> > >  1 file changed, 4 insertions(+), 2 deletions(-)
> > 
> > Wait, what? Why is this being autosel'd?
> 
> Stable trees try to pick up device enablement patches (such as patches
> that add PCI IDs). I suppose that AUTOSEL get pretty eager to grab
> those.

Is it so common that old drivers will work with new HW with just a
PCI_ID update?

I would have guessed that is the minority situation

Jason