Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753563AbdDOJzC (ORCPT ); Sat, 15 Apr 2017 05:55:02 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:43997 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752716AbdDOJy7 (ORCPT ); Sat, 15 Apr 2017 05:54:59 -0400 Date: Sat, 15 Apr 2017 11:54:50 +0200 (CEST) From: Thomas Gleixner To: David Howells cc: LKML , gnomes@lxorguk.ukuu.org.uk, gregkh@linuxfoundation.org, Daniel Lezcano , linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, Jens Rottmann , Andres Salomon Subject: Re: [PATCH 06/38] Annotate hardware config module parameters in drivers/clocksource/ In-Reply-To: <15283.1492235470@warthog.procyon.org.uk> Message-ID: References: <149141141298.29162.5612793122429261720.stgit@warthog.procyon.org.uk> <149141145858.29162.13072730133817038218.stgit@warthog.procyon.org.uk> <12228.1492210765@warthog.procyon.org.uk> <15283.1492235470@warthog.procyon.org.uk> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 479 Lines: 17 On Sat, 15 Apr 2017, David Howells wrote: > Thomas Gleixner wrote: > > > > Btw, is it possible to use IRQ grants to prevent a device that has limited > > > IRQ options from being drivable? > > > > What do you mean with 'IRQ grants' ? > > request_irq(). I still can't parse the sentence above. If request_irq() fails the device initialization fails. If you request the wrong irq then request_irq() might succeed but the device won't work. Thanks, tglx