diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2022-11-25 02:25:51 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-12-05 21:21:01 +0300 |
| commit | 61bf992fc618503c910416f28afa0b015838b72b (patch) | |
| tree | cb7076b5658c01be314cd01a5a687a018c79b107 /kernel/irq/msi.c | |
| parent | ebca4396ee18521e9e5d435a15e5d0ab2eb6b009 (diff) | |
| download | linux-61bf992fc618503c910416f28afa0b015838b72b.tar.xz | |
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 <tglx@linutronix.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232325.501144862@linutronix.de
Diffstat (limited to 'kernel/irq/msi.c')
| -rw-r--r-- | kernel/irq/msi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index c368116e8b08..0a3890598b75 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -772,6 +772,17 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode, { struct irq_domain *domain; + if (info->hwsize > MSI_XA_DOMAIN_SIZE) + return NULL; + + /* + * Hardware size 0 is valid for backwards compatibility and for + * domains which are not backed by a hardware table. Grant the + * maximum index space. + */ + if (!info->hwsize) + info->hwsize = MSI_XA_DOMAIN_SIZE; + msi_domain_update_dom_ops(info); if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS) msi_domain_update_chip_ops(info); |