[PATCH 6.6.y 1/5] i2c: core: fix irq domain leak on adapter registration failure

[Sasha Levin <sashal@kernel.org>]

From: Johan Hovold <johan@kernel.org>

[ Upstream commit 8ce19524e4cc2462685f596a6402fbd8fb984ab2 ]

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>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Stable-dep-of: ba14d7cf2fe7 ("i2c: core: fix adapter registration race")
Signed-off-by: Sasha Levin <sashal@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 943f0021d6a2c1..4b3bc72ef53ddf 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1551,7 +1551,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
 	res = device_register(&adap->dev);
 	if (res) {
 		pr_err("adapter '%s': can't register device (%d)\n", adap->name, res);
-		goto out_list;
+		goto err_remove_irq_domain;
 	}
 
 	adap->debugfs = debugfs_create_dir(dev_name(&adap->dev), i2c_debugfs_root);
@@ -1599,6 +1599,8 @@ 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