Commit-ID: 5c331c8626f5d39722d07101c699c8e794f5629d
Gitweb: http://git.kernel.org/tip/5c331c8626f5d39722d07101c699c8e794f5629d
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Tue, 4 Mar 2014 15:19:16 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 4 Mar 2014 17:37:55 +0100
irqchip: xtensa: Select only an online cpu
The user space interface does not filter out offline cpus. It merily
verifies that the mask contains at least one online cpu. So the
selector in the irq chip implementation needs to make sure to pick
only an online cpu because otherwise:
Offline Core 1
Set affinity to 0xe
Selector will pick first set bit, i.e. core 1
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Cc: xtensa <linux-xtensa@xxxxxxxxxxxxxxxx>
---
drivers/irqchip/irq-xtensa-mx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-xtensa-mx.c b/drivers/irqchip/irq-xtensa-mx.c
index f693f1b..e1c2f96 100644
--- a/drivers/irqchip/irq-xtensa-mx.c
+++ b/drivers/irqchip/irq-xtensa-mx.c
@@ -122,7 +122,7 @@ static int xtensa_mx_irq_retrigger(struct irq_data *d)
static int xtensa_mx_irq_set_affinity(struct irq_data *d,
const struct cpumask *dest, bool force)
{
- unsigned mask = 1u << cpumask_any(dest);
+ unsigned mask = 1u << cpumask_any_and(dest, cpu_online_mask);
set_er(mask, MIROUT(d->hwirq - HW_IRQ_MX_BASE));
return 0;
--
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