[patch 05/10] genirq/msi: Add domain info flag MSI_FLAG_CAN_EXPAND

[Thomas Gleixner]

Not all MSI domains support runtime expansions of PCI/MSI-X vectors. Add a
domain flag so implementations can opt in.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 include/linux/msi.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -494,6 +494,8 @@ enum {
 	MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS	= (1 << 9),
 	/* Free MSI descriptors */
 	MSI_FLAG_FREE_MSI_DESCS		= (1 << 10),
+	/* MSI vectors can be expanded after initial setup */
+	MSI_FLAG_CAN_EXPAND		= (1 << 11),
 };
 
 int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,