From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bl2on0123.outbound.protection.outlook.com ([65.55.169.123]:33007 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756317AbcCaPGF (ORCPT ); Thu, 31 Mar 2016 11:06:05 -0400 Message-ID: <1459436757.1998.14.camel@rtd-VirtualBox> Subject: Re: PCI IRQ issue since 4.2 kernel From: Rob Groner To: Bjorn Helgaas CC: "linux-pci@vger.kernel.org" , "jiang.liu@linux.intel.com" , "bhelgaas@google.com" , "tglx@linutronix.de" Date: Thu, 31 Mar 2016 11:05:57 -0400 In-Reply-To: <20160331134000.GA31995@localhost> References: <1459430795.1998.11.camel@rtd-VirtualBox> <20160331134000.GA31995@localhost> Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org List-ID: On Thu, 2016-03-31 at 09:40 -0400, Bjorn Helgaas wrote: > Hi Rob, > > On Thu, Mar 31, 2016 at 09:26:35AM -0400, Rob Groner wrote: > > We became aware of an issue with our Linux drivers when used with a 4.4 > > kernel. These drivers had worked previously from 2.6.35 to 4.2 kernels. > > The symptoms were that, even though the request_irq() call was > > successful, we did not receive any IRQs. IRQs did arrive on a different > > IRQ line, however, and the kernel disabled that line because there was > > no handler. > > Others have seen similar issues, so we reverted 991de2e59090 ("PCI, x86: > Implement pcibios_alloc_irq() and pcibios_free_irq()"). > > The revert, 6c777e8799a9 ("Revert "PCI, x86: Implement pcibios_alloc_irq() > and pcibios_free_irq()""), appeared in v4.5-rc6, so if you try that or a > later kernel (including v4.5), it should work. > > Let us know if you still see problems. > > Bjorn I installed the 4.5 kernel from kernel.org and my issue has been resolved. Thank you very much! Will this revert possibly make it into 4.3 and 4.4, or will I have to tell people to avoid those versions? Thanks! Rob