This patch is motivated by the comment it removes from gic_init_fiq, namely that the spin locks in eoi_irq preclude certain platforms from supporting FIQ.
Currently there is only one upstream platform (tegra) that actually hooks gic_arch_extn.irq_eoi and it does not require these spin locks.
Signed-off-by: Daniel Thompson daniel.thompson@linaro.org Cc: Thomas Gleixner tglx@linutronix.de Cc: Jason Cooper jason@lakedaemon.net Cc: Peter De Schrijver pdeschrijver@nvidia.com --- drivers/irqchip/irq-gic.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 0300c08..1cbff1d 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -191,11 +191,8 @@ static void gic_unmask_irq(struct irq_data *d)
static void gic_eoi_irq(struct irq_data *d) { - if (gic_arch_extn.irq_eoi) { - raw_spin_lock(&irq_controller_lock); + if (gic_arch_extn.irq_eoi) gic_arch_extn.irq_eoi(d); - raw_spin_unlock(&irq_controller_lock); - }
writel_relaxed(gic_irq(d), gic_cpu_base(d) + GIC_CPU_EOI); } @@ -426,13 +423,6 @@ static void __init gic_init_fiq(struct gic_chip_data *gic, unsigned int i;
/* - * FIQ can only be supported on platforms without an extended irq_eoi - * method (otherwise we take a lock during eoi handling). - */ - if (gic_arch_extn.irq_eoi) - return; - - /* * If grouping is not available (not implemented or prohibited by * security mode) these registers a read-as-zero/write-ignored. * However as a precaution we restore the reset default regardless of