From patchwork Sun Sep 7 18:57:55 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Gordeev X-Patchwork-Id: 386738 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 25BA01400BB for ; Mon, 8 Sep 2014 04:59:00 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752748AbaIGS6o (ORCPT ); Sun, 7 Sep 2014 14:58:44 -0400 Received: from 6.77.broadband6.iol.cz ([88.101.77.6]:43367 "EHLO dhcp-27-160.brq.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752711AbaIGS63 (ORCPT ); Sun, 7 Sep 2014 14:58:29 -0400 Received: from dhcp-27-160.brq.redhat.com (localhost.localdomain [127.0.0.1]) by dhcp-27-160.brq.redhat.com (8.14.8/8.14.8) with ESMTP id s87IwArW023706; Sun, 7 Sep 2014 20:58:10 +0200 Received: (from agordeev@localhost) by dhcp-27-160.brq.redhat.com (8.14.8/8.14.8/Submit) id s87Iw8Xx023705; Sun, 7 Sep 2014 20:58:08 +0200 From: Alexander Gordeev To: linux-kernel@vger.kernel.org Cc: Alexander Gordeev , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org Subject: [PATCH v2 3/3] PCI/MSI: Remove arch_msi_check_device() Date: Sun, 7 Sep 2014 20:57:55 +0200 Message-Id: <50a2f79ce58b6b67b40d7737b21c168131240c31.1410078503.git.agordeev@redhat.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: References: Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org There are no archs that override arch_msi_check_device() hook. Remove it as it is completely redundant. If an arch would need to check MSI/MSI-X possibility for a device it should make it within arch_setup_msi_irqs() hook. Cc: Michael Ellerman Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-pci@vger.kernel.org Signed-off-by: Alexander Gordeev --- drivers/pci/msi.c | 49 +++++++++++++------------------------------------ include/linux/msi.h | 3 --- 2 files changed, 13 insertions(+), 39 deletions(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 5a40516..6c2cc41 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -56,16 +56,6 @@ void __weak arch_teardown_msi_irq(unsigned int irq) chip->teardown_irq(chip, irq); } -int __weak arch_msi_check_device(struct pci_dev *dev, int nvec, int type) -{ - struct msi_chip *chip = dev->bus->msi; - - if (!chip || !chip->check_device) - return 0; - - return chip->check_device(chip, dev, nvec, type); -} - int __weak arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) { struct msi_desc *entry; @@ -806,22 +796,23 @@ out_free: } /** - * pci_msi_check_device - check whether MSI may be enabled on a device + * pci_msi_supported - check whether MSI may be enabled on a device * @dev: pointer to the pci_dev data structure of MSI device function * @nvec: how many MSIs have been requested ? - * @type: are we checking for MSI or MSI-X ? * * Look at global flags, the device itself, and its parent buses * to determine if MSI/-X are supported for the device. If MSI/-X is * supported return 0, else return an error code. **/ -static int pci_msi_check_device(struct pci_dev *dev, int nvec, int type) +static int pci_msi_supported(struct pci_dev *dev, int nvec) { struct pci_bus *bus; - int ret; /* MSI must be globally enabled and supported by the device */ - if (!pci_msi_enable || !dev || dev->no_msi) + if (!pci_msi_enable) + return -EINVAL; + + if (!dev || dev->no_msi || dev->current_state != PCI_D0) return -EINVAL; /* @@ -843,10 +834,6 @@ static int pci_msi_check_device(struct pci_dev *dev, int nvec, int type) if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI) return -EINVAL; - ret = arch_msi_check_device(dev, nvec, type); - if (ret) - return ret; - return 0; } @@ -949,13 +936,13 @@ int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec) int status, nr_entries; int i, j; - if (!entries || !dev->msix_cap || dev->current_state != PCI_D0) - return -EINVAL; - - status = pci_msi_check_device(dev, nvec, PCI_CAP_ID_MSIX); + status = pci_msi_supported(dev, nvec); if (status) return status; + if (!entries) + return -EINVAL; + nr_entries = pci_msix_vec_count(dev); if (nr_entries < 0) return nr_entries; @@ -1062,8 +1049,9 @@ int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec) int nvec; int rc; - if (dev->current_state != PCI_D0) - return -EINVAL; + rc = pci_msi_supported(dev, minvec); + if (rc) + return rc; WARN_ON(!!dev->msi_enabled); @@ -1086,17 +1074,6 @@ int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec) nvec = maxvec; do { - rc = pci_msi_check_device(dev, nvec, PCI_CAP_ID_MSI); - if (rc < 0) { - return rc; - } else if (rc > 0) { - if (rc < minvec) - return -ENOSPC; - nvec = rc; - } - } while (rc); - - do { rc = msi_capability_init(dev, nvec); if (rc < 0) { return rc; diff --git a/include/linux/msi.h b/include/linux/msi.h index 8103f32..dbf7cc9 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -60,7 +60,6 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); void arch_teardown_msi_irq(unsigned int irq); int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); void arch_teardown_msi_irqs(struct pci_dev *dev); -int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); void arch_restore_msi_irqs(struct pci_dev *dev); void default_teardown_msi_irqs(struct pci_dev *dev); @@ -77,8 +76,6 @@ struct msi_chip { int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev, struct msi_desc *desc); void (*teardown_irq)(struct msi_chip *chip, unsigned int irq); - int (*check_device)(struct msi_chip *chip, struct pci_dev *dev, - int nvec, int type); }; #endif /* LINUX_MSI_H */