linux-kernel - Re: [PATCH 3/4] ARM: dts: imx28-tx28: fix interrupt flags and use interrupts-extended 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: <20171016105632.709e653c@karo-electronics.de>
Date:   Mon, 16 Oct 2017 10:56:32 +0200
From:   Lothar Waßmann <LW@...O-electronics.de>
To:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Cc:     Fabio Estevam <fabio.estevam@....com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Sascha Hauer <kernel@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] ARM: dts: imx28-tx28: fix interrupt flags and use
 interrupts-extended property

Hi,

On Mon, 16 Oct 2017 09:17:26 +0200 Uwe Kleine-König wrote:
> Hello,
> 
> On Wed, Oct 11, 2017 at 01:05:38PM +0200, Lothar Waßmann wrote:
> > diff --git a/arch/arm/boot/dts/imx28-tx28.dts b/arch/arm/boot/dts/imx28-tx28.dts
> > index 211e67d..3c852f7 100644
> > --- a/arch/arm/boot/dts/imx28-tx28.dts
> > +++ b/arch/arm/boot/dts/imx28-tx28.dts
> > @@ -328,8 +328,7 @@
> >  		reg = <0x20>;
> >  		pinctrl-names = "default";
> >  		pinctrl-0 = <&tx28_pca9554_pins>;
> > -		interrupt-parent = <&gpio3>;
> > -		interrupts = <28 0>;
> > +		interrupts-extended = <&gpio3 28 IRQ_TYPE_NONE>;
> >  		gpio-controller;
> >  		#gpio-cells = <2>;
> >  		interrupt-controller;
> 
> While interrupts-extended looks nice,
> Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
> has:
> 
> 	"interrupts-extended" should only be used when a device has
> 	multiple interrupt parents.
> 
> If this is still true, this patch is wrong.
>
Thanks for the hint. It really helps to read the documentation
sometimes, rahter than relying on existing code only...

A quick check shows, that more than 100 of the 130 uses of
interrupts-extended are wrong. :(


Lothar Waßmann