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Message-ID: <20170718154521.GA7132@localhost>
Date: Tue, 18 Jul 2017 17:45:21 +0200
From: Johan Hovold <johan@...nel.org>
To: Alexey Khoroshilov <khoroshilov@...ras.ru>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jslaby@...e.com>, Arnd Bergmann <arnd@...db.de>,
linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
ldv-project@...uxtesting.org
Subject: Re: [PATCH v2] serial: 8250: fix error handling in
of_platform_serial_probe()
On Tue, Jul 18, 2017 at 02:32:11PM +0300, Alexey Khoroshilov wrote:
> clk_disable_unprepare(info->clk) is missed in of_platform_serial_probe(),
> while irq_dispose_mapping(port->irq) is missed in of_platform_serial_setup().
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
> @@ -167,7 +167,9 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
> port->handle_irq = fsl8250_handle_irq;
>
> return 0;
> -out:
> +err_dispose:
> + irq_dispose_mapping(port->irq);
> +err_unprepare:
> if (info->clk)
> clk_disable_unprepare(info->clk);
> return ret;
> @@ -217,15 +219,18 @@ static int of_platform_serial_probe(struct platform_device *ofdev)
>
> ret = serial8250_register_8250_port(&port8250);
> if (ret < 0)
> - goto out;
> + goto err_register;
>
> info->type = port_type;
> info->line = ret;
> platform_set_drvdata(ofdev, info);
> return 0;
> -out:
> - kfree(info);
> +err_register:
> irq_dispose_mapping(port8250.port.irq);
> + if (info->clk)
> + clk_disable_unprepare(info->clk);
> +err_setup:
> + kfree(info);
Please name also these error labels after what they do rather than after
from where you jump to them (i.e. as you did above in
of_platform_serial_setup()).
Thanks,
Johan
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