Re: [PATCH] HID: quirks: fix support for Apple Magic Keyboards

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Oct 17, 2018 at 06:49:16PM +0200, Benjamin Tissoires wrote:
> On Wed, Oct 17, 2018 at 5:55 PM Natanael Copa <ncopa@alpinelinux.org> wrote:
> >
> > On Wed, 17 Oct 2018 16:59:15 +0200
> > Benjamin Tissoires <benjamin.tissoires@redhat.com> wrote:
> >
> > > Hi Natanael,
> > >
> > > On Wed, Oct 17, 2018 at 4:52 PM Natanael Copa <ncopa@alpinelinux.org> wrote:
> > > >
> > > > Commit ee3454924370 ("HID: add support for Apple Magic Keyboards") added
> > > > support for the Magic Keyboard over Bluetooth, but did not add the
> > > > BT_VENDOR_ID_APPLE to hid-quirks. Fix this so hid-apple driver is used
> > > > over hid-generic.
> > > >
> > > > This fixes the Fn key, which does not work at all with hid-generic.
> > > >
> > > > Fixes: ee3454924370 ("HID: add support for Apple Magic Keyboards")
> > > > Bugzilla-id: https://bugzilla.kernel.org/show_bug.cgi?id=99881
> > > > Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
> > > > ---
> > > > This should be backported to stable too.
> > > >
> > > >  drivers/hid/hid-quirks.c | 3 +++
> > > >  1 file changed, 3 insertions(+)
> > > >
> > > > diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
> > > > index 249d49b6b16c..a3b3aecf8628 100644
> > > > --- a/drivers/hid/hid-quirks.c
> > > > +++ b/drivers/hid/hid-quirks.c
> > > > @@ -270,6 +270,9 @@ static const struct hid_device_id hid_have_special_driver[] = {
> > > >         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO) },
> > > >         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_JIS) },
> > > >         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_ANSI) },
> > > > +       { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_ANSI) },
> > > > +       { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_ANSI) },
> > > > +       { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_ANSI) },
> > >
> > > NACK, this should not be required with kernels v4.17+ IIRC.
> > >
> > > If it doesn't work on a recent kernel, please raise the issue, but I
> > > am actually chasing down the new inclusions of these when we add new
> > > device support.
> >
> > Fair enough. I think it may be needed for 4.14.y kernels though, to fix
> > commit b6cc0ba2cbf4 (HID: add support for Apple Magic Keyboards).
> >
> > Fn key did not work without this patch on 4.14.76 for me.
> 
> Right, b6cc0ba2cbf4 has been added to 4.14.75 and is not working
> because tweaking hid_have_special_driver[] is not required in current
> kernels anymore.
> 
> @stable folks, would it be possible to take this patch in the v4.9 and
> v4.14 trees? It can't go into Linus' tree, but I'd be glad to give my
> Acked-by for a stable backport.

Sure, if you resend it in a format that I can apply it in, with the text
saying why this is not applicable to newer kernel versions.

thanks,

greg k-h