diff options
Diffstat (limited to 'kernel/irq/msi.c')
| -rw-r--r-- | kernel/irq/msi.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 8b415bdb0425..74499980cfc2 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -986,6 +986,31 @@ unlock: msi_unlock_descs(dev); } +/** + * msi_match_device_irq_domain - Match a device irq domain against a bus token + * @dev: Pointer to the device + * @domid: Domain id + * @bus_token: Bus token to match against the domain bus token + * + * Return: True if device domain exists and bus tokens match. + */ +bool msi_match_device_irq_domain(struct device *dev, unsigned int domid, + enum irq_domain_bus_token bus_token) +{ + struct msi_domain_info *info; + struct irq_domain *domain; + bool ret = false; + + msi_lock_descs(dev); + domain = msi_get_device_domain(dev, domid); + if (domain && irq_domain_is_msi_device(domain)) { + info = domain->host_data; + ret = info->bus_token == bus_token; + } + msi_unlock_descs(dev); + return ret; +} + int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev, int nvec, msi_alloc_info_t *arg) { |