[RFC PATCH v4 09/13] genirq/msi: Add support for .msi_unprepare callback
From: Lokesh Vutla <hidden>
Date: 2018-12-27 06:15:13
Also in:
linux-arm-kernel, lkml
Subsystem:
irq domains (irq number mapping library), irq subsystem, the rest · Maintainers:
Thomas Gleixner, Linus Torvalds
Add an optional callback .msi_unprepare to struct msi_domain_ops. This is used to clear any effect that is done by .msi_prepare callback. Signed-off-by: Lokesh Vutla <redacted> --- include/linux/msi.h | 3 +++ kernel/irq/msi.c | 10 ++++++++++ 2 files changed, 13 insertions(+)
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 474490826f8c..f35dd19f6c69 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h@@ -239,6 +239,8 @@ struct msi_domain_ops { int (*msi_prepare)(struct irq_domain *domain, struct device *dev, int nvec, msi_alloc_info_t *arg); + void (*msi_unprepare)(struct irq_domain *domain, int nvec, + void *data); void (*msi_finish)(msi_alloc_info_t *arg, int retval); void (*set_desc)(msi_alloc_info_t *arg, struct msi_desc *desc);
@@ -319,6 +321,7 @@ void platform_msi_domain_free_irqs(struct device *dev); /* When an MSI domain is used as an intermediate domain */ int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev, int nvec, msi_alloc_info_t *args); +void msi_domain_unprepare_irqs(struct irq_domain *domain, int nvec, void *data); int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev, int virq, int nvec, msi_alloc_info_t *args); struct irq_domain *
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index eb7459324113..1a1738690519 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c@@ -312,6 +312,16 @@ int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev, return ret; } +void msi_domain_unprepare_irqs(struct irq_domain *domain, int nvec, + void *data) +{ + struct msi_domain_info *info = domain->host_data; + struct msi_domain_ops *ops = info->ops; + + if (ops->msi_unprepare) + ops->msi_unprepare(domain, nvec, data); +} + int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev, int virq, int nvec, msi_alloc_info_t *arg) {
--
2.19.2