linux-kernel - Re: [PATCH 1/4] firmware: arm_ffa: Allow FF-A initialisation even when notification fails

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Message-ID: <20231025095053.i7bpswi6x6ckqdnr@bogus>
Date:   Wed, 25 Oct 2023 10:50:53 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Jens Wiklander <jens.wiklander@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Coboy Chen <coboy.chen@...iatek.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>
Subject: Re: [PATCH 1/4] firmware: arm_ffa: Allow FF-A initialisation even
 when notification fails

On Wed, Oct 25, 2023 at 09:10:11AM +0200, Jens Wiklander wrote:
> On Tue, Oct 24, 2023 at 12:56 PM Sudeep Holla <sudeep.holla@....com> wrote:
> >
> > FF-A notifications are optional feature in the specification. Currently
> > we allow to continue if the firmware reports no support for the
> > notifications. However, we fail to continue and complete the FF-A
> > driver initialisation if the notification setup fails for any reason.
> >
> > Let us allow the FF-A driver to complete the initialisation even if the
> > notification fails to setup. We will just flag the error and continue
> > to provide other features in the driver.
> >
> > Signed-off-by: Sudeep Holla <sudeep.holla@....com>
> > ---
> >  drivers/firmware/arm_ffa/driver.c | 21 +++++++++------------
> >  1 file changed, 9 insertions(+), 12 deletions(-)
> >
> > diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
> > index 07b72c679247..b4ba52d674e5 100644
> > --- a/drivers/firmware/arm_ffa/driver.c
> > +++ b/drivers/firmware/arm_ffa/driver.c
[..]
> > @@ -1426,10 +1426,11 @@ static int ffa_notifications_setup(void)
> >         ret = ffa_sched_recv_cb_update(drv_info->vm_id, ffa_self_notif_handle,
> >                                        drv_info, true);
> >         if (!ret)
> > -               return ret;
> > +               return;
> >  cleanup:
> > +       pr_info("Notification setup failed %d, not enabled\n", ret);
> >         ffa_notifications_cleanup();
> > -       return ret;
> > +       return;
>
> This return is redundant.
>

Thanks, will fix it.

--
Regards,
Sudeep