[PATCH 2/2] RFT: gpio: tegra186: Set affinity callback to parent

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

This assigns the .irq_set_affinity to the parent callback.
I assume the Tegra186 is an SMP system so this would be
beneficial.

I used the pattern making the hirerarchy tolerant for missing
parent as in Marc's earlier patch.

Cc: Thierry Reding <treding@xxxxxxxxxx>
Cc: Vidya Sagar <vidyas@xxxxxxxxxx>
Suggested-by: Marc Zyngier <maz@xxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
 drivers/gpio/gpio-tegra186.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpio/gpio-tegra186.c b/drivers/gpio/gpio-tegra186.c
index 9500074b1f1b..5060e81f5f49 100644
--- a/drivers/gpio/gpio-tegra186.c
+++ b/drivers/gpio/gpio-tegra186.c
@@ -444,6 +444,16 @@ static int tegra186_irq_set_wake(struct irq_data *data, unsigned int on)
 	return 0;
 }
 
+static int tegra186_irq_set_affinity(struct irq_data *data,
+				     const struct cpumask *dest,
+				     bool force)
+{
+	if (data->parent_data)
+		return irq_chip_set_affinity_parent(data, dest, force);
+
+	return 0;
+}
+
 static void tegra186_gpio_irq(struct irq_desc *desc)
 {
 	struct tegra_gpio *gpio = irq_desc_get_handler_data(desc);
@@ -690,6 +700,7 @@ static int tegra186_gpio_probe(struct platform_device *pdev)
 	gpio->intc.irq_unmask = tegra186_irq_unmask;
 	gpio->intc.irq_set_type = tegra186_irq_set_type;
 	gpio->intc.irq_set_wake = tegra186_irq_set_wake;
+	gpio->intc.irq_set_affinity = tegra186_irq_set_affinity;
 
 	irq = &gpio->gpio.irq;
 	irq->chip = &gpio->intc;
-- 
2.26.2