[PATCH v2 1/9] i2c: core: fix irq domain leak on adapter registration failure

[Johan Hovold <johan@kernel.org>]

Make sure to tear down the host notify irq domain on adapter
registration failure to avoid leaking it.

This issue was flagged by Sashiko when reviewing another adapter
registration fix.

Fixes: 4d5538f5882a ("i2c: use an IRQ to report Host Notify events, not alert")
Cc: stable@vger.kernel.org	# 4.10
Cc: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/i2c/i2c-core-base.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 9c46147e3506..abe8341c1d6e 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1574,7 +1574,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
 	if (res) {
 		pr_err("adapter '%s': can't register device (%d)\n", adap->name, res);
 		put_device(&adap->dev);
-		goto out_list;
+		goto err_remove_irq_domain;
 	}
 
 	adap->debugfs = debugfs_create_dir(dev_name(&adap->dev), i2c_debugfs_root);
@@ -1609,6 +1609,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
 	init_completion(&adap->dev_released);
 	device_unregister(&adap->dev);
 	wait_for_completion(&adap->dev_released);
+err_remove_irq_domain:
+	i2c_host_notify_irq_teardown(adap);
 out_list:
 	mutex_lock(&core_lock);
 	idr_remove(&i2c_adapter_idr, adap->nr);
-- 
2.53.0