linux-kernel - Re: [PATCH V3] tty: serial: meson: Fix the compile link error reported by kernel test robot

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Date:   Mon, 28 Feb 2022 15:13:48 +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 V3] tty: serial: meson: Fix the compile link error
 reported by kernel test robot

Hi,

On 28/02/2022 14:55, 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: ("tty: serial:meson: Describes the calculation of the UART baud rate clock using a clock frame“)

As I already replied on V2 of this patch, you're invited to apply these fixes directly
on the next version of your "Use CCF to describe the UART baud rate clock" patchset
and not as a separate patch.

Thanks,
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