linux-kernel - Re: [PATCH V2] spmi: pmic-arb: Enforce the ownership check optionally

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Message-ID: <20170824121818.GE3685@dragon>
Date:   Thu, 24 Aug 2017 20:18:20 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Stephen Boyd <sboyd@...eaurora.org>
Cc:     Kiran Gunda <kgunda@...eaurora.org>, gregkh@...uxfoundation.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Abhijeet Dharmapurikar <adharmap@...eaurora.org>,
        David Collins <collinsd@...eaurora.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-arm-msm-owner@...r.kernel.org
Subject: Re: [PATCH V2] spmi: pmic-arb: Enforce the ownership check optionally

On Tue, Aug 22, 2017 at 01:31:32PM -0700, Stephen Boyd wrote:
> Also, I see that on v4.13-rc series the read/write checks are
> causing the led driver to fail in a different way:
> 
>     spmi spmi-0: error: impermissible write to peripheral sid:0 addr:0xc040
>     qcom-spmi-gpio 200f000.spmi:pm8916@0:gpios@...0: write 0x40 failed
>     leds-gpio soc:leds: Error applying setting, reverse things back
>     spmi spmi-0: error: impermissible write to peripheral sid:0 addr:0xc041
>     qcom-spmi-gpio 200f000.spmi:pm8916@0:gpios@...0: write 0x41 failed
>     leds-gpio: probe of soc:leds failed with error -1 
> 
> Are you seeing similar behavior?

Yes.  I forgot to mention that, and leds-gpio failure is gone after
applying Kiran's patch below.

spmi: pmic-arb: remove the read/write access checks

Shawn