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: Thomas Gleixner <[email protected]>
Tested-by: Krzysztof Kozlowski <[email protected]>
Cc: Kyungmin Park <[email protected]>
Cc: Marek Szyprowski <[email protected]>
Cc: Bartlomiej Zolnierkiewicz <[email protected]>
Cc: Tomasz Figa <[email protected]>,
Cc: Daniel Lezcano <[email protected]>,
Cc: Kukjin Kim <[email protected]>
Cc: [email protected],
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>

diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 4300b6606f5e3276c11656ff29506b665e9a2a87..57d165e026f43ac4ba3f0ba0a0f422025ad2b117 100644 (file)
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -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;