From 15137825100422c4c393c87af5aa5a8fa297b1f3 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sat, 27 Jan 2024 21:47:29 +0530 Subject: irqchip/gic-v3: Make gic_irq_domain_select() robust for zero parameter count Currently the irqdomain select callback is only invoked when the parameter count of the fwspec arguments is not zero. That makes sense because then the match is on the firmware node and eventually on the bus_token, which is already handled in the core code. The upcoming support for per device MSI domains requires to do real bus token specific checks in the MSI parent domains with a zero parameter count. Make the gic-v3 select() callback handle that case. Signed-off-by: Thomas Gleixner Signed-off-by: Anup Patel Signed-off-by: Thomas Gleixner Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20240127161753.114685-2-apatel@ventanamicro.com --- drivers/irqchip/irq-gic-v3.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/irqchip/irq-gic-v3.c') diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 98b0329b7154..35b9362d178f 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1702,9 +1702,13 @@ static int gic_irq_domain_select(struct irq_domain *d, irq_hw_number_t hwirq; /* Not for us */ - if (fwspec->fwnode != d->fwnode) + if (fwspec->fwnode != d->fwnode) return 0; + /* Handle pure domain searches */ + if (!fwspec->param_count) + return d->bus_token == bus_token; + /* If this is not DT, then we have a single domain */ if (!is_of_node(fwspec->fwnode)) return 1; -- cgit v1.2.3