mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
30 lines
981 B
Diff
30 lines
981 B
Diff
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--- a/drivers/gpio/gpio-realtek-otto.c
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+++ b/drivers/gpio/gpio-realtek-otto.c
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@@ -304,6 +304,7 @@ static int realtek_gpio_irq_set_affinity
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static int realtek_gpio_irq_init(struct gpio_chip *gc)
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{
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struct realtek_gpio_ctrl *ctrl = gpiochip_get_data(gc);
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+ void __iomem *irq_cpu_mask;
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unsigned int port;
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int cpu;
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@@ -311,8 +312,16 @@ static int realtek_gpio_irq_init(struct
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realtek_gpio_write_imr(ctrl, port, 0, 0);
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realtek_gpio_clear_isr(ctrl, port, GENMASK(7, 0));
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- for_each_cpu(cpu, &ctrl->cpu_irq_maskable)
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- iowrite8(GENMASK(7, 0), realtek_gpio_irq_cpu_mask(ctrl, port, cpu));
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+ /*
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+ * Uniprocessor builds assume a mask always contains one CPU,
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+ * so only start the loop if we have at least one maskable CPU.
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+ */
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+ if(!cpumask_empty(&ctrl->cpu_irq_maskable)) {
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+ for_each_cpu(cpu, &ctrl->cpu_irq_maskable) {
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+ irq_cpu_mask = realtek_gpio_irq_cpu_mask(ctrl, port, cpu);
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+ iowrite8(GENMASK(7, 0), irq_cpu_mask);
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+ }
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+ }
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}
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return 0;
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