irqchip/metag-ext: Report that effective affinity is a single target

The metag-ext driver only targets a single CPU at a time, even if
the notional affinity is wider. Let's inform the core code
about this.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: http://lkml.kernel.org/r/20170818083925.10108-10-marc.zyngier@arm.com

2 files changed, 5 insertions, 0 deletions

diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index 5b7a45d99cfb..7d8b322e5101 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig
@@ -26,6 +26,7 @@ config METAG
         select HAVE_SYSCALL_TRACEPOINTS
         select HAVE_UNDERSCORE_SYMBOL_PREFIX
         select IRQ_DOMAIN
+        select GENERIC_IRQ_EFFECTIVE_AFF_MASK
         select MODULES_USE_ELF_RELA
         select OF
         select OF_EARLY_FLATTREE
diff --git a/drivers/irqchip/irq-metag-ext.c b/drivers/irqchip/irq-metag-ext.c
index 0cdd923d1535..be7216bfb8dd 100644
--- a/drivers/irqchip/irq-metag-ext.c
+++ b/drivers/irqchip/irq-metag-ext.c
@@ -518,6 +518,8 @@ static int meta_intc_set_affinity(struct irq_data *data,
 
         metag_out32(TBI_TRIG_VEC(TBID_SIGNUM_TR2(thread)), vec_addr);
 
+        irq_data_update_effective_affinity(data, cpumask_of(cpu));
+
         return 0;
 }
 #else
@@ -578,6 +580,8 @@ static int meta_intc_map(struct irq_domain *d, unsigned int irq,
         else
                 irq_set_chip_and_handler(irq, &meta_intc_edge_chip,
                                          handle_edge_irq);
+
+        irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
         return 0;
 }