linux-kernel - Re: [PATCH 0/2] irqchip/gic*: Complain about the use of IRQ_TYPE

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: <5f274a06-3a9c-7d41-2e4d-9733e4ac6078@arm.com>
Date:   Fri, 16 Mar 2018 16:19:44 +0000
From:   Robin Murphy <robin.murphy@....com>
To:     Marc Zyngier <marc.zyngier@....com>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>
Subject: Re: [PATCH 0/2] irqchip/gic*: Complain about the use of IRQ_TYPE_NONE

On 16/03/18 14:55, Marc Zyngier wrote:
> Grepping through the dts files, the documentation, and reviewing
> patches, one can only notice the use of IRQ_TYPE_NONE in interrupt
> specifiers. At least for the GIC, this doesn't mean anything. The
> unsuspecting driver will end-up with whatever was there before, and
> there is a 50% probability that it is not what it wants.
> 
> I'd love to fix it myself, but I also have a 50% probability of
> getting it wrong. In order to make the user aware they are walking on
> thin ice, let's add some warnings. Hopefully, they'll be annoying
> enough that people will fix their firmware. Croudsourcing debugging...

I guess there's also the alternative nuclear option of breaking their 
build ;)

Robin.

----->8-----
diff --git a/include/dt-bindings/interrupt-controller/irq.h 
b/include/dt-bindings/interrupt-controller/irq.h
index a8b310555f14..de79af80d01e 100644
--- a/include/dt-bindings/interrupt-controller/irq.h
+++ b/include/dt-bindings/interrupt-controller/irq.h
@@ -10,7 +10,7 @@
  #ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_IRQ_H
  #define _DT_BINDINGS_INTERRUPT_CONTROLLER_IRQ_H

-#define IRQ_TYPE_NONE		0
+#define IRQ_TYPE_NONE		"This is nonsense and needs fixing"
  #define IRQ_TYPE_EDGE_RISING	1
  #define IRQ_TYPE_EDGE_FALLING	2
  #define IRQ_TYPE_EDGE_BOTH	(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)