[patch 04/10] genirq/msi: Prepare MSI domain alloc/free for range irq allocation

Thomas Gleixner
2021-11-27T02:17:04Z

Make the iterators in the allocation and free functions range based.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/irq/msi.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -877,6 +877,7 @@ int __msi_domain_alloc_irqs(struct irq_d
msi_alloc_info_t arg = { };
unsigned int vflags = 0;
struct msi_desc *desc;
+ unsigned long idx;
int allocated = 0;
int i, ret, virq;

@@ -906,7 +907,10 @@ int __msi_domain_alloc_irqs(struct irq_d
vflags |= VIRQ_NOMASK_QUIRK;
}

- msi_for_each_desc(desc, dev, MSI_DESC_NOTASSOCIATED) {
+ xa_for_each_range(&dev->msi.data->store, idx, desc, range->first, range->last) {
+ if (!msi_desc_match(desc, MSI_DESC_NOTASSOCIATED))
+ continue;
+
ops->set_desc(&arg, desc);

virq = __irq_domain_alloc_irqs(domain, -1, desc->nvec_used,
@@ -999,10 +1003,14 @@ void __msi_domain_free_irqs(struct irq_d
struct msi_domain_info *info = domain->host_data;
struct irq_data *irqd;
struct msi_desc *desc;
+ unsigned long idx;
int i;

/* Only handle MSI entries which have an interrupt associated */
- msi_for_each_desc(desc, dev, MSI_DESC_ASSOCIATED) {
+ xa_for_each_range(&dev->msi.data->store, idx, desc, range->first, range->last) {
+ if (!msi_desc_match(desc, MSI_DESC_ASSOCIATED))
+ continue;
+
/* Make sure all interrupts are deactivated */
for (i = 0; i < desc->nvec_used; i++) {
irqd = irq_domain_get_irq_data(domain, desc->irq + i);