linux-kernel - Re: droid 4: connection refused from voltage

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Message-ID: <20180704194556.GA9189@lenoch>
Date:   Wed, 4 Jul 2018 21:45:56 +0200
From:   Ladislav Michl <ladis@...ux-mips.org>
To:     Pavel Machek <pavel@....cz>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        linux-pm@...r.kernel.org,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, tony@...mide.com, sre@...nel.org,
        nekit1000@...il.com, mpartap@....net, merlijn@...zup.org
Subject: Re: droid 4: connection refused from voltage_now

On Wed, Jul 04, 2018 at 07:11:56PM +0200, Pavel Machek wrote:
> Hi!
> 
> I started to use droid 4 as my primary phone... so I have battery
> monitor running for hours... Once every few days it dies with
> "connection refused" error reading battery's "voltage_now". I restart
> it and it continues working...

Ha! What exactly that "connection refused" means? Is it ECONNREFUSED (111)?
I have custom at91 based board here with few custom power supply drivers
and it sometimes ends with voltage_now of my driver being unreadable.
(I modified userspace code and waiting what's in errno in case reading fails)

> That was with v4.17; in v4.18, I'm getting "red screen" a lot.

Tests are also done v4.17.
Adding linux-pm@...r.kernel.org as it seems to be subsytem, specific.

	ladis