diff mbox series

[04/33] genirq/msi: Add size info to struct msi_domain_info

Message ID 20221111135205.486390836@linutronix.de
State New
Headers show
Series genirq, PCI/MSI: Support for per device MSI and PCI/IMS - Part 3 implementation | expand

Commit Message

Thomas Gleixner Nov. 11, 2022, 1:58 p.m. UTC 
To allow proper range checking especially for dynamic allocations add a
size field to struct msi_domain_info. If the field is 0 then the size is
unknown or unlimited (up to MSI_MAX_INDEX) to provide backwards
compability.

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

Patch

--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -410,6 +410,7 @@  struct msi_domain_ops {
  * struct msi_domain_info - MSI interrupt domain data
  * @flags:		Flags to decribe features and capabilities
  * @bus_token:		The domain bus token
+ * @hwsize:		The hardware table size (0 if unknown/unlimited)
  * @ops:		The callback data structure
  * @chip:		Optional: associated interrupt chip
  * @chip_data:		Optional: associated interrupt chip data
@@ -421,6 +422,7 @@  struct msi_domain_ops {
 struct msi_domain_info {
 	u32				flags;
 	enum irq_domain_bus_token	bus_token;
+	unsigned int			hwsize;
 	struct msi_domain_ops		*ops;
 	struct irq_chip			*chip;
 	void				*chip_data;