From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:36352 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756449AbeDKS5f (ORCPT ); Wed, 11 Apr 2018 14:57:35 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christoph Hellwig , Steven Rostedt , Linus Torvalds , Sasha Levin Subject: [PATCH 4.9 114/310] PCI/msi: fix the pci_alloc_irq_vectors_affinity stub Date: Wed, 11 Apr 2018 20:34:13 +0200 Message-Id: <20180411183627.083537008@linuxfoundation.org> In-Reply-To: <20180411183622.305902791@linuxfoundation.org> References: <20180411183622.305902791@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christoph Hellwig [ Upstream commit 83b4605b0c16cde5b00c8cf192408d51eab75402 ] We need to return an error for any call that asks for MSI / MSI-X vectors only, so that non-trivial fallback logic can work properly. Also valid dev->irq and use the "correct" errno value based on feedback from Linus. Signed-off-by: Christoph Hellwig Reported-by: Steven Rostedt Fixes: aff17164 ("PCI: Provide sensible IRQ vector alloc/free routines") Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- include/linux/pci.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1348,9 +1348,9 @@ static inline int pci_alloc_irq_vectors( unsigned int min_vecs, unsigned int max_vecs, unsigned int flags) { - if (min_vecs > 1) - return -EINVAL; - return 1; + if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq) + return 1; + return -ENOSPC; } static inline void pci_free_irq_vectors(struct pci_dev *dev) {