From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from galois.linutronix.de (Galois.linutronix.de. [2a0a:51c0:0:12e:550::1]) by gmr-mx.google.com with ESMTPS id d18si761822lfg.3.2021.12.06.14.51.05 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Dec 2021 14:51:05 -0800 (PST) Message-ID: <20211206210747.650487479@linutronix.de> From: Thomas Gleixner Subject: [patch V2 01/31] genirq/msi: Move descriptor list to struct msi_device_data References: <20211206210600.123171746@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Date: Mon, 6 Dec 2021 23:51:04 +0100 (CET) To: LKML Cc: Bjorn Helgaas , Marc Zygnier , Alex Williamson , Kevin Tian , Jason Gunthorpe , Megha Dey , Ashok Raj , linux-pci@vger.kernel.org, Cedric Le Goater , xen-devel@lists.xenproject.org, Juergen Gross , Greg Kroah-Hartman , Niklas Schnelle , linux-s390@vger.kernel.org, Heiko Carstens , Christian Borntraeger , Logan Gunthorpe , Jon Mason , Dave Jiang , Allen Hubbe , linux-ntb@googlegroups.com List-ID: It's only required when MSI is in use. Signed-off-by: Thomas Gleixner Reviewed-by: Greg Kroah-Hartman --- drivers/base/core.c | 3 --- include/linux/device.h | 4 ---- include/linux/msi.h | 4 +++- kernel/irq/msi.c | 5 ++++- 4 files changed, 7 insertions(+), 9 deletions(-) --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -2874,9 +2874,6 @@ void device_initialize(struct device *de INIT_LIST_HEAD(&dev->devres_head); device_pm_init(dev); set_dev_node(dev, NUMA_NO_NODE); -#ifdef CONFIG_GENERIC_MSI_IRQ - INIT_LIST_HEAD(&dev->msi_list); -#endif INIT_LIST_HEAD(&dev->links.consumers); INIT_LIST_HEAD(&dev->links.suppliers); INIT_LIST_HEAD(&dev->links.defer_sync); --- a/include/linux/device.h +++ b/include/linux/device.h @@ -423,7 +423,6 @@ struct dev_msi_info { * @pins: For device pin management. * See Documentation/driver-api/pin-control.rst for details. * @msi: MSI related data - * @msi_list: Hosts MSI descriptors * @numa_node: NUMA node this device is close to. * @dma_ops: DMA mapping operations for this device. * @dma_mask: Dma mask (if dma'ble device). @@ -519,9 +518,6 @@ struct device { struct dev_pin_info *pins; #endif struct dev_msi_info msi; -#ifdef CONFIG_GENERIC_MSI_IRQ - struct list_head msi_list; -#endif #ifdef CONFIG_DMA_OPS const struct dma_map_ops *dma_ops; #endif --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -145,11 +145,13 @@ struct msi_desc { * @properties: MSI properties which are interesting to drivers * @attrs: Pointer to the sysfs attribute group * @platform_data: Platform-MSI specific data + * @list: List of MSI descriptors associated to the device */ struct msi_device_data { unsigned long properties; const struct attribute_group **attrs; struct platform_msi_priv_data *platform_data; + struct list_head list; }; int msi_setup_device_data(struct device *dev); @@ -174,7 +176,7 @@ unsigned int msi_get_virq(struct device /* Helpers to hide struct msi_desc implementation details */ #define msi_desc_to_dev(desc) ((desc)->dev) -#define dev_to_msi_list(dev) (&(dev)->msi_list) +#define dev_to_msi_list(dev) (&(dev)->msi.data->list) #define first_msi_entry(dev) \ list_first_entry(dev_to_msi_list((dev)), struct msi_desc, list) #define for_each_msi_entry(desc, dev) \ --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -99,7 +99,9 @@ EXPORT_SYMBOL_GPL(get_cached_msi_msg); static void msi_device_data_release(struct device *dev, void *res) { - WARN_ON_ONCE(!list_empty(&dev->msi_list)); + struct msi_device_data *md = res; + + WARN_ON_ONCE(!list_empty(&md->list)); dev->msi.data = NULL; } @@ -124,6 +126,7 @@ int msi_setup_device_data(struct device if (!md) return -ENOMEM; + INIT_LIST_HEAD(&md->list); dev->msi.data = md; devres_add(dev, md); return 0;