linux-kernel - Re: [PATCH v1 1/2] usb: typec: intel_pmc_mux: Don't leak the ACPI device reference count

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Message-ID: <Y7P1VlECj5XwBNyP@kuha.fi.intel.com>
Date:   Tue, 3 Jan 2023 11:28:54 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v1 1/2] usb: typec: intel_pmc_mux: Don't leak the ACPI
 device reference count

On Mon, Jan 02, 2023 at 10:29:32PM +0200, Andy Shevchenko wrote:
> When acpi_dev_get_memory_resources() fails, the reference count is
> left bumped. Drop it as it's done in the other error paths.
> 
> Fixes: 43d596e32276 ("usb: typec: intel_pmc_mux: Check the port status before connect")
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/usb/typec/mux/intel_pmc_mux.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
> index fdbf3694e21f..87e2c9130607 100644
> --- a/drivers/usb/typec/mux/intel_pmc_mux.c
> +++ b/drivers/usb/typec/mux/intel_pmc_mux.c
> @@ -614,8 +614,10 @@ static int pmc_usb_probe_iom(struct pmc_usb *pmc)
>  
>  	INIT_LIST_HEAD(&resource_list);
>  	ret = acpi_dev_get_memory_resources(adev, &resource_list);
> -	if (ret < 0)
> +	if (ret < 0) {
> +		acpi_dev_put(adev);
>  		return ret;
> +	}
>  
>  	rentry = list_first_entry_or_null(&resource_list, struct resource_entry, node);
>  	if (rentry)
> -- 
> 2.35.1

thanks,

-- 
heikki