From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932570AbcILVJO (ORCPT ); Mon, 12 Sep 2016 17:09:14 -0400 Received: from mail.kernel.org ([198.145.29.136]:54196 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754388AbcILVJI (ORCPT ); Mon, 12 Sep 2016 17:09:08 -0400 Subject: [PATCH v2 2/8] PCI: pciehp: Return IRQ_NONE when we can't read interrupt status To: Mayurkumar Patel From: Bjorn Helgaas Cc: Rajat Jain , MikaWesterberg@linux.intel.com, linux-pci@vger.kernel.org, Rafael J Wysocki , linux-kernel@vger.kernel.org, Keith Busch , Luis Antonio Tarazona-Duarte , Andy Shevchenko , mika.westerberg@linux.intel.com Date: Mon, 12 Sep 2016 16:09:04 -0500 Message-ID: <20160912210904.22258.59775.stgit@bhelgaas-glaptop2.roam.corp.google.com> In-Reply-To: <20160912210507.22258.63097.stgit@bhelgaas-glaptop2.roam.corp.google.com> References: <20160912210507.22258.63097.stgit@bhelgaas-glaptop2.roam.corp.google.com> User-Agent: StGit/0.16 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org After 1469d17dd341 ("PCI: pciehp: Handle invalid data when reading from non-existent devices"), we returned IRQ_HANDLED when we failed to read interrupt status from the bridge. I think it's better to return IRQ_NONE, as we do in other cases where there's no interrupt pending. This will facilitate refactoring the loop in pcie_isr(): we'll be able to call the ISR in a loop as long as it returns IRQ_HANDLED. Return IRQ_NONE if we couldn't read interrupt status. Signed-off-by: Bjorn Helgaas --- drivers/pci/hotplug/pciehp_hpc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 264df36..b8efe1b 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -561,7 +561,7 @@ static irqreturn_t pcie_isr(int irq, void *dev_id) if (status == (u16) ~0) { ctrl_info(ctrl, "%s: no response from device\n", __func__); - return IRQ_HANDLED; + return IRQ_NONE; } /*