irqchip: Gic: Support forced affinity setting
authorThomas Gleixner <tglx@linutronix.de>
Wed, 16 Apr 2014 14:36:44 +0000 (14:36 +0000)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 17 Apr 2014 21:36:28 +0000 (23:36 +0200)
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: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Krzysztof 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: Thomas Gleixner <tglx@linutronix.de>
drivers/irqchip/irq-gic.c

index 4300b6606f5e3276c11656ff29506b665e9a2a87..57d165e026f43ac4ba3f0ba0a0f422025ad2b117 100644 (file)
@@ -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;