linux-kernel - Re: [PATCH v4 2/2] firmware: arm_scmi: Augment SMC/HVC to allow optional interrupt

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Message-ID: <CANCKTBuRQDdrEdNJ7m_+ypfb0_q5wuApfG82uDWuGykqov7TjA@mail.gmail.com>
Date:   Wed, 6 Jan 2021 09:33:57 -0500
From:   Jim Quinlan <jim2101024@...il.com>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     Jim Quinlan <james.quinlan@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        "open list:SYSTEM CONTROL & POWER/MANAGEMENT INTERFACE Mes..." 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 2/2] firmware: arm_scmi: Augment SMC/HVC to allow
 optional interrupt

On Wed, Jan 6, 2021 at 4:30 AM Sudeep Holla <sudeep.holla@....com> wrote:
>
> On Tue, Jan 05, 2021 at 01:32:49PM -0500, Jim Quinlan wrote:
>
> [...]
>
> >
> > I don't think that is the case;  the bottom routine,
> > do_wait_for_common(), decrements the x->done after a completion (which
> > does an increment).  Regardless, I think it is prudent to add the
> > reinit patch you've provided below.
> >
>
> Ah right, but I will add that.
>
> > BTW, one thing I could have done was incorporate the timeout value but
> > I thought that since this is the "fast" call we shouldn't be timing
> > out at all.
> >
>
> Agreed, we can add it later. However it is not related to fast call, it is
> more for protection against failure of delivery of interrupt from the platform
> or any firmware responsible IMO.
>
> > > This electronic communication and the information and any files
> > > transmitted with it, or attached to it, are confidential and are intended
> > > solely for the use of the individual or entity to whom it is addressed and
> > > may contain information that is confidential, legally privileged,
> > > protected by privacy laws, or otherwise restricted from disclosure to
> > > anyone else. If you are not the intended recipient or the person
> > > responsible for delivering the e-mail to the intended recipient, you are
> > > hereby notified that any use, copying, distributing, dissemination,
> > > forwarding, printing, or copying of this e-mail is strictly prohibited. If
> > > you received this e-mail in error, please return the e-mail to the sender,
> > > delete it from your computer, and destroy any printed copy of it.
>
> I am assuming this was unintentional and ignoring. If not disregard my
> response. Otherwise you may need to fix your mail server.
Hi Sudeep,
Yes please ignore the above legalize in my email -- our company is
attaching this text to all outgoing emails.  We are working on a
general solution.
Regards,
Jim Quinlan
Broadcom STB
>
> --
> Regards,
> Sudeep