[patch 08/39] genirq/msi: Provide msi_domain_ops::post_free()

Thomas Gleixner
2022-11-11T13:55:12Z

To prepare for removing the exposure of __msi_domain_free_irqs() provide a
post_free() callback in the MSI domain ops which can be used to solve
the problem of the only user of __msi_domain_free_irqs() in arch/powerpc.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
include/linux/msi.h | 4 ++++
kernel/irq/msi.c | 2 ++
2 files changed, 6 insertions(+)

--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -315,6 +315,8 @@ struct msi_domain_info;
* function.
* @domain_free_irqs: Optional function to override the default free
* function.
+ * @msi_post_free: Optional function which is invoked after freeing
+ * all interrupts.
*
* @get_hwirq, @msi_init and @msi_free are callbacks used by the underlying
* irqdomain.
@@ -359,6 +361,8 @@ struct msi_domain_ops {
struct device *dev, int nvec);
void (*domain_free_irqs)(struct irq_domain *domain,
struct device *dev);
+ void (*msi_post_free)(struct irq_domain *domain,
+ struct device *dev);
};

/**
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -1026,6 +1026,8 @@ void msi_domain_free_irqs_descs_locked(s
lockdep_assert_held(&dev->msi.data->mutex);

ops->domain_free_irqs(domain, dev);
+ if (ops->msi_post_free)
+ ops->msi_post_free(domain, dev);
msi_domain_free_msi_descs(info, dev);
}