linux-kernel - Re: [PATCH V2] tty: serial: meson: Fix the compile link error reported by kernel test robot

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Date:   Mon, 28 Feb 2022 10:52:15 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Yu Tu <yu.tu@...ogic.com>, linux-serial@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH V2] tty: serial: meson: Fix the compile link error
 reported by kernel test robot

i,

On 28/02/2022 10:03, Yu Tu wrote:
> Describes the calculation of the UART baud rate clock using a clock
> frame. Forgot to add in Kconfig kernel test Robot compilation error
> due to COMMON_CLK dependency.
> 
> Fixes: 44023b8e1f14 ("tty: serial:meson: Describes the calculation of the UART baud rate clock using a clock frame“)

AFAIK this commit is not in an uptream/feature branch, so you should simply fix your `Use CCF to describe the UART baud rate clock` instead.

Neil

> Reported-by: kernel test robot <lkp@...el.com>
> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: Yu Tu <yu.tu@...ogic.com>
> ---
>   drivers/tty/serial/Kconfig      |  1 +
>   drivers/tty/serial/meson_uart.c | 37 +++++++++++++++++++++++----------
>   2 files changed, 27 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
> index e952ec5c7a7c..a0f2b82fc18b 100644
> --- a/drivers/tty/serial/Kconfig
> +++ b/drivers/tty/serial/Kconfig
> @@ -200,6 +200,7 @@ config SERIAL_KGDB_NMI
>   config SERIAL_MESON
>   	tristate "Meson serial port support"
>   	depends on ARCH_MESON || COMPILE_TEST
> +	depends on COMMON_CLK
>   	select SERIAL_CORE
>   	help
>   	  This enables the driver for the on-chip UARTs of the Amlogic
> diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
> index bf6be5468aaf..972f210f3492 100644
> --- a/drivers/tty/serial/meson_uart.c
> +++ b/drivers/tty/serial/meson_uart.c
> @@ -780,28 +780,37 @@ static int meson_uart_probe(struct platform_device *pdev)
>   		return ret;
>   
>   	irq = platform_get_irq(pdev, 0);
> -	if (irq < 0)
> -		return irq;
> +	if (irq < 0) {
> +		ret = irq;
> +		goto err_out_clk_disable;
> +	}
>   
>   	of_property_read_u32(pdev->dev.of_node, "fifo-size", &fifosize);
>   
>   	if (meson_ports[pdev->id]) {
>   		dev_err(&pdev->dev, "port %d already allocated\n", pdev->id);
> -		return -EBUSY;
> +		ret = -EBUSY;
> +		goto err_out_clk_disable;
>   	}
>   
>   	port = devm_kzalloc(&pdev->dev, sizeof(struct uart_port), GFP_KERNEL);
> -	if (!port)
> -		return -ENOMEM;
> +	if (!port) {
> +		ret = -ENOMEM;
> +		goto err_out_clk_disable;
> +	}
>   
>   	port->membase = devm_ioremap_resource(&pdev->dev, res_mem);
> -	if (IS_ERR(port->membase))
> -		return PTR_ERR(port->membase);
> +	if (IS_ERR(port->membase)) {
> +		ret = PTR_ERR(port->membase);
> +		goto err_out_clk_disable;
> +	}
>   
>   	private_data = devm_kzalloc(&pdev->dev, sizeof(*private_data),
>   				    GFP_KERNEL);
> -	if (!private_data)
> -		return -ENOMEM;
> +	if (!private_data) {
> +		ret = -ENOMEM;
> +		goto err_out_clk_disable;
> +	}
>   
>   	if (device_get_match_data(&pdev->dev))
>   		private_data->use_xtal_clk = true;
> @@ -822,7 +831,7 @@ static int meson_uart_probe(struct platform_device *pdev)
>   
>   	ret = meson_uart_probe_clocks(port);
>   	if (ret)
> -		return ret;
> +		goto err_out_clk_disable;
>   
>   	meson_ports[pdev->id] = port;
>   	platform_set_drvdata(pdev, port);
> @@ -831,9 +840,15 @@ static int meson_uart_probe(struct platform_device *pdev)
>   	meson_uart_reset(port);
>   
>   	ret = uart_add_one_port(&meson_uart_driver, port);
> -	if (ret)
> +	if (ret) {
>   		meson_ports[pdev->id] = NULL;
> +		goto err_out_clk_disable;
> +	}
> +
> +	return 0;
>   
> +err_out_clk_disable:
> +	clk_disable_unprepare(pclk);
>   	return ret;
>   }
>   
> 
> base-commit: c2faf737abfb10f88f2d2612d573e9edc3c42c37