[tip: irq/msi] PCI/MSI: Move msi_lock to struct pci_dev

tip-bot2 for Thomas Gleixner
2021-12-09T16:07:10Z

The following commit has been merged into the irq/msi branch of tip:

Commit-ID: cd119b09a87d8beb50356d8c5c6aa42d89c44eb7
Gitweb: https://git.kernel.org/tip/cd119b09a87d8beb50356d8c5c6aa42d89c44eb7
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Mon, 06 Dec 2021 23:27:56 +01:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Thu, 09 Dec 2021 11:52:22 +01:00

PCI/MSI: Move msi_lock to struct pci_dev

It's only required for PCI/MSI. So no point in having it in every struct
device.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211206210224.925241961@linutronix.de

---
drivers/base/core.c | 1 -
drivers/pci/msi/msi.c | 2 +-
drivers/pci/probe.c | 4 +++-
include/linux/device.h | 2 --
include/linux/pci.h | 1 +
5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index fd034d7..f26c668 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2875,7 +2875,6 @@ void device_initialize(struct device *dev)
device_pm_init(dev);
set_dev_node(dev, NUMA_NO_NODE);
#ifdef CONFIG_GENERIC_MSI_IRQ
- raw_spin_lock_init(&dev->msi_lock);
INIT_LIST_HEAD(&dev->msi_list);
#endif
INIT_LIST_HEAD(&dev->links.consumers);
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index 465fe9e..443a16c 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -18,7 +18,7 @@ int pci_msi_ignore_mask;

static noinline void pci_msi_update_mask(struct msi_desc *desc, u32 clear, u32 set)
{
- raw_spinlock_t *lock = &desc->dev->msi_lock;
+ raw_spinlock_t *lock = &to_pci_dev(desc->dev)->msi_lock;
unsigned long flags;

if (!desc->pci.msi_attrib.can_mask)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 087d365..443efb0 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2311,7 +2311,9 @@ struct pci_dev *pci_alloc_dev(struct pci_bus *bus)
INIT_LIST_HEAD(&dev->bus_list);
dev->dev.type = &pci_dev_type;
dev->bus = pci_bus_get(bus);
-
+#ifdef CONFIG_PCI_MSI
+ raw_spin_lock_init(&dev->msi_lock);
+#endif
return dev;
}
EXPORT_SYMBOL(pci_alloc_dev);
diff --git a/include/linux/device.h b/include/linux/device.h
index e270cb7..2a22875 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -407,7 +407,6 @@ struct dev_links_info {
* @em_pd: device's energy model performance domain
* @pins: For device pin management.
* See Documentation/driver-api/pin-control.rst for details.
- * @msi_lock: Lock to protect MSI mask cache and mask register
* @msi_list: Hosts MSI descriptors
* @msi_domain: The generic MSI domain this device is using.
* @numa_node: NUMA node this device is close to.
@@ -508,7 +507,6 @@ struct device {
struct dev_pin_info *pins;
#endif
#ifdef CONFIG_GENERIC_MSI_IRQ
- raw_spinlock_t msi_lock;
struct list_head msi_list;
#endif
#ifdef CONFIG_DMA_OPS
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8cb1036..5cc46ba 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -474,6 +474,7 @@ struct pci_dev {
#endif
#ifdef CONFIG_PCI_MSI
void __iomem *msix_base;
+ raw_spinlock_t msi_lock;
const struct attribute_group **msi_irq_groups;
#endif
struct pci_vpd vpd;