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-rw-r--r--kernel/irq/irqdesc.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index a7174617616..bb07f2928f4 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -363,6 +363,13 @@ __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
if (from > irq)
return -EINVAL;
from = irq;
+ } else {
+ /*
+ * For interrupts which are freely allocated the
+ * architecture can force a lower bound to the @from
+ * argument. x86 uses this to exclude the GSI space.
+ */
+ from = arch_dynirq_lower_bound(from);
}
mutex_lock(&sparse_irq_lock);