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-rw-r--r--kernel/irq/manage.c2
-rw-r--r--kernel/irq/proc.c4
2 files changed, 5 insertions, 1 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 81c49a4d679e..97d5559997d2 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -366,6 +366,8 @@ int request_irq(unsigned int irq,
action->next = NULL;
action->dev_id = dev_id;
+ select_smp_affinity(irq);
+
retval = setup_irq(irq, action);
if (retval)
kfree(action);
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index f26e534c6585..8a64a4844cde 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -68,7 +68,9 @@ static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
*/
cpus_and(tmp, new_value, cpu_online_map);
if (cpus_empty(tmp))
- return -EINVAL;
+ /* Special case for empty set - allow the architecture
+ code to set default SMP affinity. */
+ return select_smp_affinity(irq) ? -EINVAL : full_count;
proc_set_irq_affinity(irq, new_value);
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