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Commit ffde1de6 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

irqchip: Gic: Support forced affinity setting 



To support the affinity setting of per cpu timers in the early startup
of a not yet online cpu, implement the force logic, which disables the
cpu online check.

Tagged for stable to allow a simple fix of the affected SoC clock
event drivers.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Tomasz Figa <t.figa@samsung.com>,
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>,
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org,
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20140416143315.916984416@linutronix.de


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 01f8fa4f

drivers/irqchip/irq-gic.c

+6 −2
Original line number Diff line number Diff line
@@ -246,10 +246,14 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val, 
			    bool force)

{

	void __iomem *reg = gic_dist_base(d) + GIC_DIST_TARGET + (gic_irq(d) & ~3);

	unsigned int shift = (gic_irq(d) % 4) * 8;

	unsigned int cpu = cpumask_any_and(mask_val, cpu_online_mask);

	unsigned int cpu, shift = (gic_irq(d) % 4) * 8;

	u32 val, mask, bit;



	if (!force)

		cpu = cpumask_any_and(mask_val, cpu_online_mask);

	else

		cpu = cpumask_first(mask_val);



	if (cpu >= NR_GIC_CPU_IF || cpu >= nr_cpu_ids)

		return -EINVAL;