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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: 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
Subject: [patch 2/4] irqchip: gic: Support forced affinity setting
Date: Wed, 16 Apr 2014 14:36:44 -0000
Message-ID: <20140416143315.916984416@linutronix.de> (raw)
In-Reply-To: <20140416142106.537575971@linutronix.de>

[-- Attachment #0: irqchip-gic-allow-force-affinity.patch --]
[-- Type: text/plain, Size: 1100 bytes --]

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>
---
 drivers/irqchip/irq-gic.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

Index: tip/drivers/irqchip/irq-gic.c
===================================================================
--- tip.orig/drivers/irqchip/irq-gic.c
+++ tip/drivers/irqchip/irq-gic.c
@@ -246,10 +246,14 @@ static int gic_set_affinity(struct irq_d
 			    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;
 



  reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-16 14:36 [patch 0/4] genirq/exynos timers: Fix the CPU hotplug wreckage sanely Thomas Gleixner
2014-04-16 14:36 ` Thomas Gleixner [this message]
2014-04-17 21:39   ` [tip:irq/urgent] irqchip: Gic: Support forced affinity setting tip-bot for Thomas Gleixner
2014-04-16 14:36 ` [patch 1/4] genirq: Allow forcing cpu affinity of interrupts Thomas Gleixner
2014-04-17 21:39   ` [tip:irq/urgent] " tip-bot for Thomas Gleixner
2014-04-16 14:36 ` [patch 4/4] clocksource: exynos_mct: Register clock event after request_irq() Thomas Gleixner
2014-04-17 21:40   ` [tip:irq/urgent] clocksource: Exynos_mct: " tip-bot for Krzysztof Kozlowski
2014-04-16 14:36 ` [patch 3/4] clocksource: exynos_mct: Use irq_force_affinity() in cpu bringup Thomas Gleixner
2014-04-17 21:40   ` [tip:irq/urgent] clocksource: Exynos_mct: Use irq_force_affinity( ) " tip-bot for Thomas Gleixner
2014-04-16 15:59 ` [patch 0/4] genirq/exynos timers: Fix the CPU hotplug wreckage sanely Krzysztof Kozlowski
2014-04-16 21:16   ` Thomas Gleixner

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