linux-kernel - Re: [RESEND][PATCH 1/2] dt-bindings: usb: add non-removable-ports hub property

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: <20200128152818.GB3437093@kroah.com>
Date:   Tue, 28 Jan 2020 16:28:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Måns Rullgård <mans@...sr.com>
Cc:     Rob Herring <robh@...nel.org>, Mark Rutland <mark.rutland@....com>,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RESEND][PATCH 1/2] dt-bindings: usb: add non-removable-ports
 hub property

On Tue, Jan 28, 2020 at 03:15:11PM +0000, Måns Rullgård wrote:
> Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:
> 
> > On Mon, Jan 27, 2020 at 04:56:15PM +0000, Måns Rullgård wrote:
> >> Rob Herring <robh@...nel.org> writes:
> >> 
> >> > On Fri, Jan 24, 2020 at 03:25:03PM +0000, Mans Rullgard wrote:
> >> >> Add a non-removable-ports property that lists the hardwired downstream
> >> >> ports of a hub.  Although hubs can provide this information, they are
> >> >> not always configured correctly.  An alternate means of indicating this
> >> >> for built-in USB devices is thus useful.
> >> >> 
> >> >> Signed-off-by: Mans Rullgard <mans@...sr.com>
> >> >
> >> > I reviewed this already, but since you didn't add my reviewed-by, I'm 
> >> > looking at it again and having 2nd thoughts.
> >> >
> >> >> ---
> >> >>  Documentation/devicetree/bindings/usb/usb-device.txt | 4 ++++
> >> >>  1 file changed, 4 insertions(+)
> >> >> 
> >> >> diff --git a/Documentation/devicetree/bindings/usb/usb-device.txt b/Documentation/devicetree/bindings/usb/usb-device.txt
> >> >> index 036be172b1ae..92d863cc96b6 100644
> >> >> --- a/Documentation/devicetree/bindings/usb/usb-device.txt
> >> >> +++ b/Documentation/devicetree/bindings/usb/usb-device.txt
> >> >> @@ -66,6 +66,10 @@ Required properties for host-controller nodes with device nodes:
> >> >>  - #size-cells: shall be 0
> >> >>  
> >> >>  
> >> >> +Optional properties for hub and host-controller nodes:
> >> >> +- non-removable-ports: list of hardwired downstream ports
> >> >
> >> > If you have a hardwired device and need to know that, doesn't that imply 
> >> > there's some other stuff you need to describe beyond what a standard USB 
> >> > device has. Such as a power supply that's not Vbus from the hub.
> >> 
> >> I suppose there could be, but there isn't in my actual situation.
> >> 
> >> > At a minimum, I think this should be a per port property.
> >> 
> >> That's what I suggested first.  Greg told me to do it like this instead.
> >
> > I said that?  I do not remember discussing this at all, when did that
> > happen?
> 
> https://lore.kernel.org/lkml/20190228155241.GC12050@kroah.com/

Almost a full year ago!  Hah, I can't remember what I wrote last week.