linux-kernel - Re: [PATCH v4 0/2] usb: override hub device bInterval with device

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

Message-ID: <20191203164010.GG10631@localhost>
Date:   Tue, 3 Dec 2019 17:40:10 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Ikjoon Jang <ikjn@...omium.org>
Cc:     linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        GregKroah-Hartman <gregkh@...uxfoundation.org>,
        RobHerring <robh+dt@...nel.org>,
        MarkRutland <mark.rutland@....com>,
        AlanStern <stern@...land.harvard.edu>,
        SuwanKim <suwan.kim027@...il.com>,
        "GustavoA . R . Silva" <gustavo@...eddedor.com>,
        JohanHovold <johan@...nel.org>, linux-kernel@...r.kernel.org,
        drinkcat@...omium.org
Subject: Re: [PATCH v4 0/2] usb: override hub device bInterval with device

On Tue, Dec 03, 2019 at 06:15:21PM +0800, Ikjoon Jang wrote:
> This patchset enables hard wired hub device to use different bInterval
> from its descriptor when the hub has a combined device node.
> 
> When we know reducing autosuspend delay for built-in HIDs is better for
> power saving, we can reduce it to the optimal value. But if a parent hub
> has a long bInterval, mouse lags a lot from more frequent autosuspend.
> So this enables overriding bInterval for a hard wired hub device only
> when we know that reduces the power consumption.
> 
> Changes in v4
> - use of_property_read_u32() instead of of_property_read_u8()

What changed in the previous versions?

Johan