From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Arnd Bergmann To: linux-pci@vger.kernel.org, Bjorn Helgaas Cc: linux-kernel@vger.kernel.org, Christoph Hellwig , Lorenzo Pieralisi , Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org, Arnd Bergmann Subject: [RFC 13/15] PCI: turn pcibios_alloc_irq into a callback Date: Fri, 17 Aug 2018 12:26:43 +0200 Message-Id: <20180817102645.3839621-14-arnd@arndb.de> In-Reply-To: <20180817102645.3839621-1-arnd@arndb.de> References: <20180817102645.3839621-1-arnd@arndb.de> Sender: linux-acpi-owner@vger.kernel.org List-ID: Weak functions are a bit confusing, and we can better deal with this using a callback function. pcibios_free_irq() is actually completely unused, but it seems better to treat it the same way as the allocation, unless we want to remove it completely. Signed-off-by: Arnd Bergmann --- arch/arm64/kernel/pci.c | 16 +++------------- drivers/pci/pci-driver.c | 13 +++++++++++-- include/linux/pci.h | 2 ++ 3 files changed, 16 insertions(+), 15 deletions(-) diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index 0e2ea1c78542..3d196c68e362 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -22,19 +22,6 @@ #include #include -#ifdef CONFIG_ACPI -/* - * Try to assign the IRQ number when probing a new device - */ -int pcibios_alloc_irq(struct pci_dev *dev) -{ - if (!acpi_disabled) - acpi_pci_irq_enable(dev); - - return 0; -} -#endif - /* * raw_pci_read/write - Platform-specific PCI config space access. */ @@ -93,6 +80,9 @@ int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) ACPI_COMPANION_SET(&bridge->dev, adev); set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev))); + + /* Try to assign the IRQ number when probing a new device */ + bridge->alloc_irq = acpi_pci_irq_enable; } return 0; diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index bef17c3fca67..c96bc7bd56da 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -387,13 +387,22 @@ static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) return error; } -int __weak pcibios_alloc_irq(struct pci_dev *dev) +int pcibios_alloc_irq(struct pci_dev *dev) { + struct pci_host_bridge *bridge = pci_find_host_bridge(dev->bus); + + if (bridge->alloc_irq) + return bridge->alloc_irq(dev); + return 0; } -void __weak pcibios_free_irq(struct pci_dev *dev) +void pcibios_free_irq(struct pci_dev *dev) { + struct pci_host_bridge *bridge = pci_find_host_bridge(dev->bus); + + if (bridge->free_irq) + bridge->free_irq(dev); } #ifdef CONFIG_PCI_IOV diff --git a/include/linux/pci.h b/include/linux/pci.h index d1072690cb4f..1296d9fcc5da 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -476,6 +476,8 @@ struct pci_host_bridge { int (*map_irq)(const struct pci_dev *, u8, u8); void (*release_fn)(struct pci_host_bridge *); void (*bus_add_device)(struct pci_dev *pdev); + int (*alloc_irq)(struct pci_dev *); + int (*free_irq)(struct pci_dev *); void *release_data; struct msi_controller *msi; unsigned int ignore_reset_delay:1; /* For entire hierarchy */ -- 2.18.0