diff options
| -rw-r--r-- | include/linux/msi.h | 6 | ||||
| -rw-r--r-- | kernel/irq/msi.c | 3 |
2 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index dca3b801428f..cb0bee3f43a7 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -410,6 +410,8 @@ struct msi_domain_info; * @msi_init: Domain specific init function for MSI interrupts * @msi_free: Domain specific function to free a MSI interrupts * @msi_prepare: Prepare the allocation of the interrupts in the domain + * @prepare_desc: Optional function to prepare the allocated MSI descriptor + * in the domain * @set_desc: Set the msi descriptor for an interrupt * @domain_alloc_irqs: Optional function to override the default allocation * function. @@ -421,7 +423,7 @@ struct msi_domain_info; * @get_hwirq, @msi_init and @msi_free are callbacks used by the underlying * irqdomain. * - * @msi_check, @msi_prepare and @set_desc are callbacks used by the + * @msi_check, @msi_prepare, @prepare_desc and @set_desc are callbacks used by the * msi_domain_alloc/free_irqs*() variants. * * @domain_alloc_irqs, @domain_free_irqs can be used to override the @@ -444,6 +446,8 @@ struct msi_domain_ops { int (*msi_prepare)(struct irq_domain *domain, struct device *dev, int nvec, msi_alloc_info_t *arg); + void (*prepare_desc)(struct irq_domain *domain, msi_alloc_info_t *arg, + struct msi_desc *desc); void (*set_desc)(msi_alloc_info_t *arg, struct msi_desc *desc); int (*domain_alloc_irqs)(struct irq_domain *domain, diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 0749e661e459..6370ea53ff4a 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -1254,6 +1254,9 @@ static int __msi_domain_alloc_irqs(struct device *dev, struct irq_domain *domain if (WARN_ON_ONCE(allocated >= ctrl->nirqs)) return -EINVAL; + if (ops->prepare_desc) + ops->prepare_desc(domain, &arg, desc); + ops->set_desc(&arg, desc); virq = __irq_domain_alloc_irqs(domain, -1, desc->nvec_used, |