On Mon, Sep 19, 2022 at 01:54:55AM -0700, Li Zhong wrote:
> Check the return value of clk_prepare_enable() which could fail when
> cannot enable the clock.
>
> Signed-off-by: Li Zhong <floridsleeves@xxxxxxxxx>
> ---
> drivers/tty/serial/8250/8250_of.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c
> index 1b461fba15a3..23e9b9e8c940 100644
> --- a/drivers/tty/serial/8250/8250_of.c
> +++ b/drivers/tty/serial/8250/8250_of.c
> @@ -298,7 +298,8 @@ static int of_serial_resume(struct device *dev)
>
> if (!uart_console(port) || console_suspend_enabled) {
> pm_runtime_get_sync(dev);
> - clk_prepare_enable(info->clk);
> + if (clk_prepare_enable(info->clk) < 0)
> + dev_warn(dev, "can't enable clk.\n");
Again, you check but do nothing with the error :(
