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authorThomas Gleixner <tglx@linutronix.de>2014-04-16 14:36:44 +0000
committerThomas Gleixner <tglx@linutronix.de>2014-04-17 23:36:28 +0200
commitffde1de64012c406dfdda8690918248b472f24e4 (patch)
tree4506aeedf6a322be1fbc9381569fb80499fc3ce1 /drivers/irqchip
parent01f8fa4f01d8362358eb90e412bd7ae18a3ec1ad (diff)
downloadop-kernel-dev-ffde1de64012c406dfdda8690918248b472f24e4.zip
op-kernel-dev-ffde1de64012c406dfdda8690918248b472f24e4.tar.gz
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 <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>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 4300b66..57d165e 100644
--- 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;
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