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authorPaul Burton <paul.burton@imgtec.com>2016-08-19 18:07:15 +0100
committerThomas Gleixner <tglx@linutronix.de>2016-08-22 18:37:51 +0200
commit2564970a381651865364974ea414384b569cb9c0 (patch)
tree4bfbdd4a519afcf1712dd025cd5041ae085314d5
parent6a33fa2b87513fee44cb8f0cd17b1acd6316bc6b (diff)
downloadlinux-stericsson-2564970a381651865364974ea414384b569cb9c0.tar.gz
irqchip/mips-gic: Implement activate op for device domain
If an IRQ is setup using __setup_irq(), which is used by the request_irq() family of functions, and we are using an SMP kernel then the affinity of the IRQ will be set via setup_affinity() immediately after the IRQ is enabled. This call to gic_set_affinity() will lead to the interrupt being mapped to a VPE. However there are other ways to use IRQs which don't cause affinity to be set, for example if it is used to chain to another IRQ controller with irq_set_chained_handler_and_data(). The irq_set_chained_handler_and_data() code path will enable the IRQ, but will not trigger a call to gic_set_affinity() and in this case nothing will map the interrupt to a VPE, meaning that the interrupt is never received. Fix this by implementing the activate operation for the GIC device IRQ domain, using gic_shared_irq_domain_map() to map the interrupt to the correct pin of cpu 0. Fixes: c98c1822ee13 ("irqchip/mips-gic: Add device hierarchy domain") Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20160819170715.27820-2-paul.burton@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--drivers/irqchip/irq-mips-gic.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 2e0f49992a98..83f498393a7f 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -893,10 +893,17 @@ void gic_dev_domain_free(struct irq_domain *d, unsigned int virq,
return;
}
+static void gic_dev_domain_activate(struct irq_domain *domain,
+ struct irq_data *d)
+{
+ gic_shared_irq_domain_map(domain, d->irq, d->hwirq, 0);
+}
+
static struct irq_domain_ops gic_dev_domain_ops = {
.xlate = gic_dev_domain_xlate,
.alloc = gic_dev_domain_alloc,
.free = gic_dev_domain_free,
+ .activate = gic_dev_domain_activate,
};
static int gic_ipi_domain_xlate(struct irq_domain *d, struct device_node *ctrlr,