[patch 10/32] PCI/MSI: Let core code free MSI descriptors

Thomas Gleixner
2021-11-27T01:29:30Z

Set the domain info flag which tells the core code to free the MSI
descriptors from msi_domain_free_irqs() and add an explicit call to the
core function into the legacy code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
drivers/pci/msi/irqdomain.c | 3 ++-
drivers/pci/msi/legacy.c | 1 +
drivers/pci/msi/msi.c | 14 --------------
3 files changed, 3 insertions(+), 15 deletions(-)

--- a/drivers/pci/msi/irqdomain.c
+++ b/drivers/pci/msi/irqdomain.c
@@ -171,7 +171,8 @@ struct irq_domain *pci_msi_create_irq_do
if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
pci_msi_domain_update_chip_ops(info);

- info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS;
+ info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS |
+ MSI_FLAG_FREE_MSI_DESCS;
if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE))
info->flags |= MSI_FLAG_MUST_REACTIVATE;

--- a/drivers/pci/msi/legacy.c
+++ b/drivers/pci/msi/legacy.c
@@ -81,4 +81,5 @@ void pci_msi_legacy_teardown_msi_irqs(st
{
msi_device_destroy_sysfs(&dev->dev);
arch_teardown_msi_irqs(dev);
+ msi_free_msi_descs(&dev->dev);
}
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -224,22 +224,8 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg);

static void free_msi_irqs(struct pci_dev *dev)
{
- struct list_head *msi_list = dev_to_msi_list(&dev->dev);
- struct msi_desc *entry, *tmp;
- int i;
-
- for_each_pci_msi_entry(entry, dev)
- if (entry->irq)
- for (i = 0; i < entry->nvec_used; i++)
- BUG_ON(irq_has_action(entry->irq + i));
-
pci_msi_teardown_msi_irqs(dev);

- list_for_each_entry_safe(entry, tmp, msi_list, list) {
- list_del(&entry->list);
- free_msi_entry(entry);
- }
-
if (dev->msix_base) {
iounmap(dev->msix_base);
dev->msix_base = NULL;