linux-kernel - Re: [PATCH v3 4/4] serial: qcom_geni: Comment use of devm_krealloc rather than devm_krealloc

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Message-ID: <20230325191426.5810b644@jic23-huawei>
Date:   Sat, 25 Mar 2023 19:14:26 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     James Clark <james.clark@....com>
Cc:     linux-kernel@...r.kernel.org, linux@...ck-us.net,
        michal.simek@....com, Jonathan.Cameron@...wei.com,
        Jonathan Corbet <corbet@....net>,
        Jean Delvare <jdelvare@...e.com>,
        Anand Ashok Dumbre <anand.ashok.dumbre@...inx.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michal Simek <michal.simek@...inx.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>, linux-doc@...r.kernel.org,
        linux-hwmon@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH v3 4/4] serial: qcom_geni: Comment use of devm_krealloc
 rather than devm_krealloc_array

On Mon, 20 Mar 2023 14:57:09 +0000
James Clark <james.clark@....com> wrote:

> Now that devm_krealloc_array is available, add a comment justifying not
> changing this occurrence to avoid any future auto fixups.
> 
> Link: https://lore.kernel.org/all/20230318173402.20a4f60d@jic23-huawei/
> Signed-off-by: James Clark <james.clark@....com>
LGTM

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  drivers/tty/serial/qcom_geni_serial.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
> index 28fbc927a546..8ae1fb7c2636 100644
> --- a/drivers/tty/serial/qcom_geni_serial.c
> +++ b/drivers/tty/serial/qcom_geni_serial.c
> @@ -1055,6 +1055,11 @@ static int setup_fifos(struct qcom_geni_serial_port *port)
>  		(port->tx_fifo_depth * port->tx_fifo_width) / BITS_PER_BYTE;
>  
>  	if (port->rx_buf && (old_rx_fifo_depth != port->rx_fifo_depth) && port->rx_fifo_depth) {
> +		/*
> +		 * Use krealloc rather than krealloc_array because rx_buf is
> +		 * accessed as 1 byte entries as well as 4 byte entries so it's
> +		 * not necessarily an array.
> +		 */
>  		port->rx_buf = devm_krealloc(uport->dev, port->rx_buf,
>  					     port->rx_fifo_depth * sizeof(u32),
>  					     GFP_KERNEL);