diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 16399de00b48..d320d15d4fba 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -125,6 +125,8 @@ struct irq_domain_chip_generic;
  *		core code.
  * @flags:	Per irq_domain flags
  * @mapcount:	The number of mapped interrupts
+ * @mutex:	Domain lock, hierarchical domains use root domain's lock
+ * @root:	Pointer to root domain, or containing structure if non-hierarchical
  *
  * Optional elements:
  * @fwnode:	Pointer to firmware node associated with the irq_domain. Pretty easy
@@ -152,6 +154,8 @@ struct irq_domain {
 	void				*host_data;
 	unsigned int			flags;
 	unsigned int			mapcount;
+	struct mutex			mutex;
+	struct irq_domain		*root;
 
 	/* Optional data */
 	struct fwnode_handle		*fwnode;
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 2213d972f083..aa5b7eeeceb8 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -215,6 +215,17 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode,
 
 	domain->revmap_size = size;
 
+	/*
+	 * Hierarchical domains use the domain lock of the root domain
+	 * (innermost domain).
+	 *
+	 * For non-hierarchical domains (as for root domains), the root
+	 * pointer is set to the domain itself so that &domain->root->mutex
+	 * always points to the right lock.
+	 */
+	mutex_init(&domain->mutex);
+	domain->root = domain;
+
 	irq_domain_check_hierarchy(domain);
 
 	return domain;
@@ -524,7 +535,7 @@ static bool irq_domain_is_nomap(struct irq_domain *domain)
 static void irq_domain_clear_mapping(struct irq_domain *domain,
 				     irq_hw_number_t hwirq)
 {
-	lockdep_assert_held(&irq_domain_mutex);
+	lockdep_assert_held(&domain->root->mutex);
 
 	if (irq_domain_is_nomap(domain))
 		return;
@@ -539,7 +550,11 @@ static void irq_domain_set_mapping(struct irq_domain *domain,
 				   irq_hw_number_t hwirq,
 				   struct irq_data *irq_data)
 {
-	lockdep_assert_held(&irq_domain_mutex);
+	/*
+	 * This also makes sure that all domains point to the same root when
+	 * called from irq_domain_insert_irq() for each domain in a hierarchy.
+	 */
+	lockdep_assert_held(&domain->root->mutex);
 
 	if (irq_domain_is_nomap(domain))
 		return;
@@ -561,7 +576,7 @@ static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
 
 	hwirq = irq_data->hwirq;
 
-	mutex_lock(&irq_domain_mutex);
+	mutex_lock(&domain->root->mutex);
 
 	irq_set_status_flags(irq, IRQ_NOREQUEST);
 
@@ -583,7 +598,7 @@ static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
 	/* Clear reverse map for this hwirq */
 	irq_domain_clear_mapping(domain, hwirq);
 
-	mutex_unlock(&irq_domain_mutex);
+	mutex_unlock(&domain->root->mutex);
 }
 
 static int irq_domain_associate_locked(struct irq_domain *domain, unsigned int virq,
@@ -633,9 +648,9 @@ int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
 {
 	int ret;
 
-	mutex_lock(&irq_domain_mutex);
+	mutex_lock(&domain->root->mutex);
 	ret = irq_domain_associate_locked(domain, virq, hwirq);
-	mutex_unlock(&irq_domain_mutex);
+	mutex_unlock(&domain->root->mutex);
 
 	return ret;
 }
@@ -752,7 +767,7 @@ unsigned int irq_create_mapping_affinity(struct irq_domain *domain,
 		return 0;
 	}
 
-	mutex_lock(&irq_domain_mutex);
+	mutex_lock(&domain->root->mutex);
 
 	/* Check if mapping already exists */
 	virq = irq_find_mapping(domain, hwirq);
@@ -763,7 +778,7 @@ unsigned int irq_create_mapping_affinity(struct irq_domain *domain,
 
 	virq = irq_create_mapping_affinity_locked(domain, hwirq, affinity);
 out:
-	mutex_unlock(&irq_domain_mutex);
+	mutex_unlock(&domain->root->mutex);
 
 	return virq;
 }
@@ -832,7 +847,7 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
 	if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
 		type &= IRQ_TYPE_SENSE_MASK;
 
-	mutex_lock(&irq_domain_mutex);
+	mutex_lock(&domain->root->mutex);
 
 	/*
 	 * If we've already configured this interrupt,
@@ -892,7 +907,7 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
 	/* Store trigger type */
 	irqd_set_trigger_type(irq_data, type);
 out:
-	mutex_unlock(&irq_domain_mutex);
+	mutex_unlock(&domain->root->mutex);
 
 	return virq;
 }
@@ -1157,6 +1172,7 @@ struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
 		domain = __irq_domain_create(fwnode, 0, ~0, 0, ops, host_data);
 
 	if (domain) {
+		domain->root = parent->root;
 		domain->parent = parent;
 		domain->flags |= flags;
 
@@ -1555,10 +1571,10 @@ int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
 			return -EINVAL;
 	}
 
-	mutex_lock(&irq_domain_mutex);
+	mutex_lock(&domain->root->mutex);
 	ret = irq_domain_alloc_irqs_locked(domain, irq_base, nr_irqs, node, arg,
 					   realloc, affinity);
-	mutex_unlock(&irq_domain_mutex);
+	mutex_unlock(&domain->root->mutex);
 
 	return ret;
 }
@@ -1569,7 +1585,7 @@ static void irq_domain_fix_revmap(struct irq_data *d)
 {
 	void __rcu **slot;
 
-	lockdep_assert_held(&irq_domain_mutex);
+	lockdep_assert_held(&d->domain->root->mutex);
 
 	if (irq_domain_is_nomap(d->domain))
 		return;
@@ -1635,7 +1651,7 @@ int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
 	if (!parent_irq_data)
 		return -ENOMEM;
 
-	mutex_lock(&irq_domain_mutex);
+	mutex_lock(&domain->root->mutex);
 
 	/* Copy the original irq_data. */
 	*parent_irq_data = *irq_data;
@@ -1663,7 +1679,7 @@ int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
 	irq_domain_fix_revmap(parent_irq_data);
 	irq_domain_set_mapping(domain, irq_data->hwirq, irq_data);
 error:
-	mutex_unlock(&irq_domain_mutex);
+	mutex_unlock(&domain->root->mutex);
 
 	return rv;
 }
@@ -1718,7 +1734,7 @@ int irq_domain_pop_irq(struct irq_domain *domain, int virq)
 	if (WARN_ON(!parent_irq_data))
 		return -EINVAL;
 
-	mutex_lock(&irq_domain_mutex);
+	mutex_lock(&domain->root->mutex);
 
 	irq_data->parent_data = NULL;
 
@@ -1730,7 +1746,7 @@ int irq_domain_pop_irq(struct irq_domain *domain, int virq)
 
 	irq_domain_fix_revmap(irq_data);
 
-	mutex_unlock(&irq_domain_mutex);
+	mutex_unlock(&domain->root->mutex);
 
 	kfree(parent_irq_data);
 
@@ -1746,17 +1762,20 @@ EXPORT_SYMBOL_GPL(irq_domain_pop_irq);
 void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
 {
 	struct irq_data *data = irq_get_irq_data(virq);
+	struct irq_domain *domain;
 	int i;
 
 	if (WARN(!data || !data->domain || !data->domain->ops->free,
 		 "NULL pointer, cannot free irq\n"))
 		return;
 
-	mutex_lock(&irq_domain_mutex);
+	domain = data->domain;
+
+	mutex_lock(&domain->root->mutex);
 	for (i = 0; i < nr_irqs; i++)
 		irq_domain_remove_irq(virq + i);
-	irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
-	mutex_unlock(&irq_domain_mutex);
+	irq_domain_free_irqs_hierarchy(domain, virq, nr_irqs);
+	mutex_unlock(&domain->root->mutex);
 
 	irq_domain_free_irq_data(virq, nr_irqs);
 	irq_free_descs(virq, nr_irqs);
