From 9b4da84450c3566886a3f3791b01924c3e87f975 Mon Sep 17 00:00:00 2001
From: David Daney <david.daney@cavium.com>
Date: Thu, 17 Aug 2017 17:53:32 -0700
Subject: [PATCH 3/8] irqdomain: Factor out code to add and remove items to and
 from the revmap

Git-commit: b526adfe1b0531fceba44b18c156e4edf9c6205c
Patch-mainline: v4.14-rc1
References: bsc#1105378

The code to add and remove items to and from the revmap occurs several
times.

In preparation for the follow on patches that add more uses of this
code, factor this out in to separate static functions.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Link: http://lkml.kernel.org/r/1503017616-3252-4-git-send-email-david.daney@cavium.com
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
---
 kernel/irq/irqdomain.c | 58 +++++++++++++++++++++++++-------------------------
 1 file changed, 29 insertions(+), 29 deletions(-)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index abc3941df8fb..e665b4f84755 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -352,6 +352,31 @@ void irq_set_default_host(struct irq_domain *domain)
 }
 EXPORT_SYMBOL_GPL(irq_set_default_host);
 
+static void irq_domain_clear_mapping(struct irq_domain *domain,
+				     irq_hw_number_t hwirq)
+{
+	if (hwirq < domain->revmap_size) {
+		domain->linear_revmap[hwirq] = 0;
+	} else {
+		mutex_lock(&revmap_trees_mutex);
+		radix_tree_delete(&domain->revmap_tree, hwirq);
+		mutex_unlock(&revmap_trees_mutex);
+	}
+}
+
+static void irq_domain_set_mapping(struct irq_domain *domain,
+				   irq_hw_number_t hwirq,
+				   struct irq_data *irq_data)
+{
+	if (hwirq < domain->revmap_size) {
+		domain->linear_revmap[hwirq] = irq_data->irq;
+	} else {
+		mutex_lock(&revmap_trees_mutex);
+		radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
+		mutex_unlock(&revmap_trees_mutex);
+	}
+}
+
 void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
 {
 	struct irq_data *irq_data = irq_get_irq_data(irq);
@@ -379,13 +404,7 @@ void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
 	irq_data->hwirq = 0;
 
 	/* Clear reverse map for this hwirq */
-	if (hwirq < domain->revmap_size) {
-		domain->linear_revmap[hwirq] = 0;
-	} else {
-		mutex_lock(&revmap_trees_mutex);
-		radix_tree_delete(&domain->revmap_tree, hwirq);
-		mutex_unlock(&revmap_trees_mutex);
-	}
+	irq_domain_clear_mapping(domain, hwirq);
 }
 
 int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
@@ -428,13 +447,7 @@ int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
 			domain->name = irq_data->chip->name;
 	}
 
-	if (hwirq < domain->revmap_size) {
-		domain->linear_revmap[hwirq] = virq;
-	} else {
-		mutex_lock(&revmap_trees_mutex);
-		radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
-		mutex_unlock(&revmap_trees_mutex);
-	}
+	irq_domain_set_mapping(domain, hwirq, irq_data);
 	mutex_unlock(&irq_domain_mutex);
 
 	irq_clear_status_flags(virq, IRQ_NOREQUEST);
@@ -1004,15 +1017,8 @@ static void irq_domain_insert_irq(int virq)
 
 	for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
 		struct irq_domain *domain = data->domain;
-		irq_hw_number_t hwirq = data->hwirq;
 
-		if (hwirq < domain->revmap_size) {
-			domain->linear_revmap[hwirq] = virq;
-		} else {
-			mutex_lock(&revmap_trees_mutex);
-			radix_tree_insert(&domain->revmap_tree, hwirq, data);
-			mutex_unlock(&revmap_trees_mutex);
-		}
+		irq_domain_set_mapping(domain, data->hwirq, data);
 
 		/* If not already assigned, give the domain the chip's name */
 		if (!domain->name && data->chip)
@@ -1035,13 +1041,7 @@ static void irq_domain_remove_irq(int virq)
 		struct irq_domain *domain = data->domain;
 		irq_hw_number_t hwirq = data->hwirq;
 
-		if (hwirq < domain->revmap_size) {
-			domain->linear_revmap[hwirq] = 0;
-		} else {
-			mutex_lock(&revmap_trees_mutex);
-			radix_tree_delete(&domain->revmap_tree, hwirq);
-			mutex_unlock(&revmap_trees_mutex);
-		}
+		irq_domain_clear_mapping(domain, hwirq);
 	}
 }
 
-- 
2.11.0