linux-kernel - Re: [PATCH V4] firmware: arm_scmi: Make scmi core independent of the transport type

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Message-ID: <20200124112235.GA40307@bogus>
Date:   Fri, 24 Jan 2020 11:22:35 +0000
From:   Sudeep Holla <sudeep.holla@....com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     arnd@...db.de, jassisinghbrar@...il.com, cristian.marussi@....com,
        peng.fan@....com, peter.hilber@...nsynergy.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH V4] firmware: arm_scmi: Make scmi core independent of the
 transport type

On Fri, Jan 24, 2020 at 08:32:12AM +0530, Viresh Kumar wrote:

[...]

>
> I think this defines the problem somewhat, though I wasn't able to
> reproduce the problem on my platform :)

No worries, I found the issue. It's devm_kzalloc in mailbox_chan_setup.
You need to pin the allocation with dev the main scmi platform device and
not individual protocol specific scmi_device. Basically, change cdev to
dev in there. It fixed the issue. You have it correct later for payload
devm_ioremap. I couldn't review the change in detail yet, allow me today.
You can post next version next week, anyways too late for v5.6 ;).

Peng, Peter,

Any comments on this ? I hope you are happy with this for SMC and virtio
based transport.

--
Regards,
Sudeep