From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755977AbbKCTLZ (ORCPT ); Tue, 3 Nov 2015 14:11:25 -0500 Received: from comal.ext.ti.com ([198.47.26.152]:53407 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755889AbbKCTLW (ORCPT ); Tue, 3 Nov 2015 14:11:22 -0500 Subject: Re: [v4.1.10-rt10][PATCH 0/2] PCI: dra7xx/dwc: fix "WARNING: CPU: 1 PID: 82 at kernel/irq/handle.c:150 handle_irq_event_percpu" To: Sebastian Andrzej Siewior , Thomas Gleixner , References: <1446492626-24396-1-git-send-email-grygorii.strashko@ti.com> <5638BAAE.6050909@linutronix.de> CC: , Sekhar Nori From: Grygorii Strashko Message-ID: <563906CE.6090707@ti.com> Date: Tue, 3 Nov 2015 21:11:10 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <5638BAAE.6050909@linutronix.de> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/03/2015 03:46 PM, Sebastian Andrzej Siewior wrote: > On 11/02/2015 08:30 PM, Grygorii Strashko wrote: >> On -RT above code will generate warnings, because driver_xx_hw_irq_handler() >> will be forced threaded (by default) and, as result, generic_handle_irq() >> will be called with IRQs enabled. To W/A this issue generic_handle_irq() can >> be surrounded by raw_spin_lock_irqsave/irqrestore(wa_lock). > > and what happens without -RT if you boot threadedirqs? > Yep. It will still warn :( Can be reworked to cover this case also, i think (if overall concept will be accepted) Thanks. -- regards, -grygorii