Re: [PATCH 6.6.y 1/4] i2c: core: fix irq domain leak on adapter registration failure

[Greg KH <greg@kroah.com>]

On Tue, Jul 21, 2026 at 02:27:55PM -0400, Sasha Levin wrote:
> 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: 07d5fb537928 ("i2c: core: fix adapter debugfs creation")
> 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
> 
> 

Didn't apply :(