From 61bf992fc618503c910416f28afa0b015838b72b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 25 Nov 2022 00:25:51 +0100 Subject: genirq/msi: Add size info to struct msi_domain_info 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 Reviewed-by: Kevin Tian Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20221124232325.501144862@linutronix.de --- include/linux/msi.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/msi.h') diff --git a/include/linux/msi.h b/include/linux/msi.h index 7fb87371541a..08a0e2abf048 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -422,6 +422,10 @@ 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 or the software index limit. + * If 0 then the size is considered unlimited and + * gets initialized to the maximum software index limit + * by the domain creation code. * @ops: The callback data structure * @chip: Optional: associated interrupt chip * @chip_data: Optional: associated interrupt chip data @@ -433,6 +437,7 @@ 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; -- cgit v1.2.3