linux-kernel - 5.0-rc1 Open circuit voltage tables -- 3afb50d7125bc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190107190555.GA18865@amd>
Date:   Mon, 7 Jan 2019 20:05:55 +0100
From:   Pavel Machek <pavel@....cz>
To:     kernel list <linux-kernel@...r.kernel.org>, baolin.wang@...aro.org,
        linus.walleij@...aro.org, sebastian.reichel@...labora.com
Subject: 5.0-rc1 Open circuit voltage tables -- 3afb50d7125bc

Hi!

Can we do something with that code?

First -- tables should not be necceessary. Formula for li-ion open
circuit voltage is well-known, and does not really depend on the
device -- only on the chemistry of battery.

state of charge = f( voltage, current, internal resistance )

(And yes, internal resistance depends on temperature and health of the
battery).

Second, even if we need tables, why is it doing multiple allocations?

info->ocv_temp[index]        = -EINVAL;

That's just wrong. Ocv_temp is temperature in celsius. Temperatures go
below zero.

								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Download attachment "signature.asc" of type "application/pgp-signature" (182 bytes)