linux-kernel - Re: [PATCH 2/2] serial: sprd: Fix DMA buffer leak issue

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Date:   Mon, 10 Jul 2023 18:03:12 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     Chunyan Zhang <chunyan.zhang@...soc.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
Cc:     linux-serial@...r.kernel.org, Orson Zhai <orsonzhai@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] serial: sprd: Fix DMA buffer leak issue



On 7/10/2023 4:03 PM, Chunyan Zhang wrote:
> Release DMA buffer when _probe() returns fail to avoid memory leak.
> 
> Fixes: f4487db58eb7 ("serial: sprd: Add DMA mode support")
> Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>

LGTM.
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>

> ---
>   drivers/tty/serial/sprd_serial.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
> index 942808517393..e1f11382fc39 100644
> --- a/drivers/tty/serial/sprd_serial.c
> +++ b/drivers/tty/serial/sprd_serial.c
> @@ -1203,7 +1203,7 @@ static int sprd_probe(struct platform_device *pdev)
>   		ret = uart_register_driver(&sprd_uart_driver);
>   		if (ret < 0) {
>   			pr_err("Failed to register SPRD-UART driver\n");
> -			return ret;
> +			goto free_rx_buf;
>   		}
>   	}
>   	sprd_ports_num++;
> @@ -1222,6 +1222,8 @@ static int sprd_probe(struct platform_device *pdev)
>   	sprd_port[index] = NULL;
>   	sprd_ports_num--;
>   	uart_unregister_driver(&sprd_uart_driver); > +free_rx_buf:
> +	sprd_rx_free_buf(sport);
>   	return ret;
>   }
>