From: Charles Keepax <ckeepax@opensource.cirrus.com>
Date: Thu, 5 Dec 2024 11:33:15 +0000 (+0000)
Subject: soundwire: bus: Move irq mapping cleanup into devres
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a5fef9baa87f8be359a4b3ed11829ebca82e56ad;p=users%2Fdwmw2%2Flinux.git

soundwire: bus: Move irq mapping cleanup into devres

Currently the IRQ mapping is disposed off in sdw_drv_remove(), however
if the SoundWire device uses devres this can run before the actual device
clean up, potentially clearing the mapping whilst it is still in use.
Make this devres safe by also moving the sdw_irq_dispose_mapping into
devres.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20241205113315.2266313-1-ckeepax@opensource.cirrus.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---

diff --git a/drivers/soundwire/bus_type.c b/drivers/soundwire/bus_type.c
index 77dc094075e13..e98d5db81b1ce 100644
--- a/drivers/soundwire/bus_type.c
+++ b/drivers/soundwire/bus_type.c
@@ -167,9 +167,6 @@ static int sdw_drv_remove(struct device *dev)
 
 	slave->probed = false;
 
-	if (slave->prop.use_domain_irq)
-		sdw_irq_dispose_mapping(slave);
-
 	mutex_unlock(&slave->sdw_dev_lock);
 
 	if (drv->remove)
diff --git a/drivers/soundwire/irq.c b/drivers/soundwire/irq.c
index 0c08cebb1235c..c237e6d0766b3 100644
--- a/drivers/soundwire/irq.c
+++ b/drivers/soundwire/irq.c
@@ -46,14 +46,18 @@ void sdw_irq_delete(struct sdw_bus *bus)
 	irq_domain_remove(bus->domain);
 }
 
+static void sdw_irq_dispose_mapping(void *data)
+{
+	struct sdw_slave *slave = data;
+
+	irq_dispose_mapping(irq_find_mapping(slave->bus->domain, slave->dev_num));
+}
+
 void sdw_irq_create_mapping(struct sdw_slave *slave)
 {
 	slave->irq = irq_create_mapping(slave->bus->domain, slave->dev_num);
 	if (!slave->irq)
 		dev_warn(&slave->dev, "Failed to map IRQ\n");
-}
 
-void sdw_irq_dispose_mapping(struct sdw_slave *slave)
-{
-	irq_dispose_mapping(irq_find_mapping(slave->bus->domain, slave->dev_num));
+	devm_add_action_or_reset(&slave->dev, sdw_irq_dispose_mapping, slave);
 }
diff --git a/drivers/soundwire/irq.h b/drivers/soundwire/irq.h
index 58a58046d92b8..86e2318409dab 100644
--- a/drivers/soundwire/irq.h
+++ b/drivers/soundwire/irq.h
@@ -16,7 +16,6 @@ int sdw_irq_create(struct sdw_bus *bus,
 		   struct fwnode_handle *fwnode);
 void sdw_irq_delete(struct sdw_bus *bus);
 void sdw_irq_create_mapping(struct sdw_slave *slave);
-void sdw_irq_dispose_mapping(struct sdw_slave *slave);
 
 #else /* CONFIG_IRQ_DOMAIN */
 
@@ -34,10 +33,6 @@ static inline void sdw_irq_create_mapping(struct sdw_slave *slave)
 {
 }
 
-static inline void sdw_irq_dispose_mapping(struct sdw_slave *slave)
-{
-}
-
 #endif /* CONFIG_IRQ_DOMAIN */
 
 #endif /* __SDW_IRQ_H */