On Fri, May 23, 2014 at 02:57:49PM +0100, Daniel Thompson wrote:

+void eoi_fiq(int fiq)
+{
+	struct irq_data *irq_data = irq_get_irq_data(fiq + fiq_start);
+	struct irq_chip *chip = irq_data_get_irq_chip(irq_data);
+
+	if (chip->irq_eoi)
+			chip->irq_eoi(irq_data);
+}

So what if the IRQ chip takes a spinlock?  You can't take spinlocks in
FIQ context...  Who checks for that kind of stuff - just hoping that
the IRQ driver doesn't take a spinlock sounds real fragile.

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