linux-kernel - Re: [PATCH -next] tty: serial: bcm63xx: fix missing clk_put() in bcm63xx

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Message-ID: <4cd8f963-9292-faef-1e24-df90821274d6@suse.cz>
Date:   Mon, 27 Apr 2020 08:19:34 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     Zou Wei <zou_wei@...wei.com>, gregkh@...uxfoundation.org,
        f.fainelli@...il.com, bcm-kernel-feedback-list@...adcom.com,
        linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] tty: serial: bcm63xx: fix missing clk_put() in
 bcm63xx_uart

On 21. 04. 20, 14:31, Zou Wei wrote:
> This patch fixes below error reported by coccicheck
> 
> drivers/tty/serial/bcm63xx_uart.c:848:2-8: ERROR: missing clk_put;
> clk_get on line 842 and execution via conditional on line 846
> 
> Fixes: ab4382d27412 ("tty: move drivers/serial/ to drivers/tty/serial/")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Zou Wei <zou_wei@...wei.com>
> ---
>  drivers/tty/serial/bcm63xx_uart.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c
> index 5674da2..ed0aa5c 100644
> --- a/drivers/tty/serial/bcm63xx_uart.c
> +++ b/drivers/tty/serial/bcm63xx_uart.c
> @@ -843,8 +843,10 @@ static int bcm_uart_probe(struct platform_device *pdev)
>  	if (IS_ERR(clk) && pdev->dev.of_node)
>  		clk = of_clk_get(pdev->dev.of_node, 0);
>  
> -	if (IS_ERR(clk))
> +	if (IS_ERR(clk)) {
> +		clk_put(clk);

Why would you want to put an erroneous clk?

>  		return -ENODEV;
> +	}
>  
>  	port->iotype = UPIO_MEM;
>  	port->irq = res_irq->start;
> 


-- 
js
suse labs