genirq: Fix descriptor init on non-sparse IRQs

The genirq changes are initializing descriptors for sparse IRQs quite
differently from how non-sparse (stacked?) IRQs are initialized, with
the effect that on my platform all IRQs are default-disabled on sparse
IRQs and default-enabled if non-sparse IRQs are used, crashing some
GPIO driver.

Fix this by refactoring the non-sparse IRQs to use the same descriptor
init function as the sparse IRQs.

Signed-off: Linus Walleij <linus.walleij@linaro.org>
Link: http://lkml.kernel.org/r/1306858479-16622-1-git-send-email-linus.walleij@stericsson.com
Cc: stable@kernel.org # 2.6.39
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 886e803..c7ddc87 100644 (file)
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -257,13 +257,11 @@ int __init early_irq_init(void)
        count = ARRAY_SIZE(irq_desc);
 
        for (i = 0; i < count; i++) {
-               desc[i].irq_data.irq = i;
-               desc[i].irq_data.chip = &no_irq_chip;
                desc[i].kstat_irqs = alloc_percpu(unsigned int);
-               irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS);
-               alloc_masks(desc + i, GFP_KERNEL, node);
-               desc_smp_init(desc + i, node);
+               alloc_masks(&desc[i], GFP_KERNEL, node);
+               raw_spin_lock_init(&desc[i].lock);
                lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
+               desc_set_defaults(i, &desc[i], node);
        }
        return arch_early_irq_init();
 }