On 14-03-18 12:56 AM, Charlie Paul wrote:
From: David Mercado <david.merc...@windriver.com>
Fix irq_set_affinity() to allow usage of buslocks with "slow bus"
IRQ controllers, such as the LSI Axxia GIC.
This change looks like it should be after patch 35/57, which introduces
the slow bus.
Also in this commit log, we describe the non-working state .. is it a
hang ? A trap ? A lock message ?
Bruce
Signed-off-by: David Mercado <david.merc...@windriver.com>
---
kernel/irq/manage.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index dc4db32..5f14a0f 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -195,16 +195,16 @@ int __irq_set_affinity_locked(struct irq_data *data,
const struct cpumask *mask)
*/
int irq_set_affinity(unsigned int irq, const struct cpumask *mask)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags,
+ IRQ_GET_DESC_CHECK_GLOBAL);
int ret;
if (!desc)
return -EINVAL;
- raw_spin_lock_irqsave(&desc->lock, flags);
ret = __irq_set_affinity_locked(irq_desc_get_irq_data(desc), mask);
- raw_spin_unlock_irqrestore(&desc->lock, flags);
+ irq_put_desc_busunlock(desc, flags);
return ret;
}
--
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