On Wed, Nov 29, 2023 at 03:52:36AM -0800, Haoran Liu wrote:
> This patch adds error handling to the serial_card_probe
> function in drivers/tty/serial/8250/8250_acorn.c. The
> serial8250_register_8250_port call within this function
> previously lacked proper handling for failure scenarios.
You do have 72 columns to use if you want :)
>
> Signed-off-by: Haoran Liu <liuhaoran14@xxxxxxx>
> ---
> drivers/tty/serial/8250/8250_acorn.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/tty/serial/8250/8250_acorn.c b/drivers/tty/serial/8250/8250_acorn.c
> index 758c4aa203ab..378ae6936028 100644
> --- a/drivers/tty/serial/8250/8250_acorn.c
> +++ b/drivers/tty/serial/8250/8250_acorn.c
> @@ -43,6 +43,7 @@ serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
> struct uart_8250_port uart;
> unsigned long bus_addr;
> unsigned int i;
> + int ret;
>
> info = kzalloc(sizeof(struct serial_card_info), GFP_KERNEL);
> if (!info)
> @@ -72,6 +73,14 @@ serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
> uart.port.mapbase = bus_addr + type->offset[i];
>
> info->ports[i] = serial8250_register_8250_port(&uart);
> + if (IS_ERR(info->ports[i])) {
> + ret = PTR_ERR(info->ports[i]);
> + while (i--)
> + serial8250_unregister_port(info->ports[i]);
> +
> + kfree(info);
> + return ret;
> + }
How was this found, and how was it tested?
thanks,
greg k-h
