1 files changed, 35 insertions, 2 deletions

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index e3336d904f64..facfecfc543c 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -204,6 +204,39 @@ int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
         return ret;
 }
 
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+static inline int irq_set_affinity_pending(struct irq_data *data,
+                                           const struct cpumask *dest)
+{
+        struct irq_desc *desc = irq_data_to_desc(data);
+
+        irqd_set_move_pending(data);
+        irq_copy_pending(desc, dest);
+        return 0;
+}
+#else
+static inline int irq_set_affinity_pending(struct irq_data *data,
+                                           const struct cpumask *dest)
+{
+        return -EBUSY;
+}
+#endif
+
+static int irq_try_set_affinity(struct irq_data *data,
+                                const struct cpumask *dest, bool force)
+{
+        int ret = irq_do_set_affinity(data, dest, force);
+
+        /*
+         * In case that the underlying vector management is busy and the
+         * architecture supports the generic pending mechanism then utilize
+         * this to avoid returning an error to user space.
+         */
+        if (ret == -EBUSY && !force)
+                ret = irq_set_affinity_pending(data, dest);
+        return ret;
+}
+
 int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask,
                             bool force)
 {
@@ -214,8 +247,8 @@ int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask,
         if (!chip || !chip->irq_set_affinity)
                 return -EINVAL;
 
-        if (irq_can_move_pcntxt(data)) {
-                ret = irq_do_set_affinity(data, mask, force);
+        if (irq_can_move_pcntxt(data) && !irqd_is_setaffinity_pending(data)) {
+                ret = irq_try_set_affinity(data, mask, force);
         } else {
                 irqd_set_move_pending(data);
                 irq_copy_pending(desc, mask);