From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1753234AbdFVQf2 (ORCPT <rfc822;w@1wt.eu>);
        Thu, 22 Jun 2017 12:35:28 -0400
Received: from mail-wr0-f181.google.com ([209.85.128.181]:36336 "EHLO
        mail-wr0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1752015AbdFVQf0 (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Thu, 22 Jun 2017 12:35:26 -0400
Date: Thu, 22 Jun 2017 18:35:21 +0200
From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Nicolas Pitre <nicolas.pitre@linaro.org>, Jens Axboe <axboe@kernel.dk>,
        Hannes Reinecke <hare@suse.com>, Bjorn Helgaas <bhelgaas@google.com>
Subject: Re: [PATCH 3/3] irq: Compute the periodic interval for interrupts
Message-ID: <20170622163521.GD2479@mai>
References: <20170620212657.GB1812@mai>
 <1497994139-19816-1-git-send-email-daniel.lezcano@linaro.org>
 <1497994139-19816-3-git-send-email-daniel.lezcano@linaro.org>
 <alpine.DEB.2.20.1706221647370.1885@nanos>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <alpine.DEB.2.20.1706221647370.1885@nanos>
User-Agent: Mutt/1.5.24 (2015-08-30)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu, Jun 22, 2017 at 05:25:56PM +0200, Thomas Gleixner wrote:

[ ... ]

> > +	ret = irq_timings_alloc(irq);
> > +	if (ret) {
> > +		pr_warn("Failed to allocate irq timing stats for irq%d (%d)",
> > +			irq, ret);
> 
> That error code is -ENOMEM always, right?

No, it could be also the value returned by idr_alloc() which could be EINVAL or
ENOSPC (which are values returned also by the low level libraries radix-tree
functions).