Re: [PATCH 1/1] efi: rtc: Enable SET/GET WAKEUP services as optional

[Shanker Donthineni]

Hi Ard Biesheuvel,

On 1/3/23 03:18, Ard Biesheuvel wrote:
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>
>
> On Mon, 2 Jan 2023 at 23:21, Alexandre Belloni
> <alexandre.belloni@xxxxxxxxxxx> wrote:
> > On 02/01/2023 11:47:11+0100, Ard Biesheuvel wrote:
> > > On Tue, 27 Dec 2022 at 05:09, Shanker Donthineni <sdonthineni@xxxxxxxxxx> wrote:
> > > > The current implementation of rtc-efi is expecting all the 4
> > > > time services GET{SET}_TIME{WAKEUP} must be supported by UEFI
> > > > firmware. As per the EFI_RT_PROPERTIES_TABLE, the platform
> > > > specific implementations can choose to enable selective time
> > > > services based on the RTC device capabilities.
> > > >
> > > > This patch does the following changes to provide GET/SET RTC
> > > > services on platforms that do not support the WAKEUP feature.
> > > >
> > > > 1) Relax time services cap check when creating a platform device.
> > > > 2) Clear RTC_FEATURE_ALARM bit in the absence of WAKEUP services.
> > > > 3) Conditional alarm entries in '/proc/driver/rtc'.
> > > >
> > > > Signed-off-by: Shanker Donthineni <sdonthineni@xxxxxxxxxx>
> > >
> > > Queued as a fix in efi/urgent, thanks.
> >
> > This rather seems like an rtc heavy patch and the subject line is
> > misleading. This should be rtc: efi:
> > Also, I'm pretty sure this doesn't qualify as an urgent fix.
>
> I'm happy to drop it from my tree, but please add a cc:stable so it
> gets backported to v6.1 at least. Otherwise, EFI compliant systems
> that implement get/set_time but not get/set_wakeup_time have no RTC at
> all on any LTS kernel until a year from now, and this was never the
> intent when we introduced the EFI_RT_PROPERTIES_TABLE.

Thanks for considering the fix for stable releases, I'll post v3 patch
with tag 'CC: <stable@xxxxxxxxxxxxxxx> # v6.0+'