[PATCH v4] tty: serial: ma35d1: Add a NULL check for of_node

[Dan Carpenter]

On Tue, Jun 25, 2024 at 06:41:28AM +0000, Jacky Huang wrote:
> From: Jacky Huang <ychuang3 at nuvoton.com>
> 
> The pdev->dev.of_node can be NULL if the "serial" node is absent.
> Add a NULL check to return an error in such cases.
> 
> Fixes: 930cbf92db01 ("tty: serial: Add Nuvoton ma35d1 serial driver support")
> Reported-by: Dan Carpenter <dan.carpenter at linaro.org>
> Closes: https://lore.kernel.org/all/8df7ce45-fd58-4235-88f7-43fe7cd67e8f@moroto.mountain/
> Signed-off-by: Jacky Huang <ychuang3 at nuvoton.com>
> ---
>   V3 -> V4: Move the version info lines to the correct position.
>   V2 -> V3: Added the "Reported-by:" line.
>   V1 -> V2: Added the "Fixes" line.

Thanks!

Reviewed-by: Dan Carpenter <dan.carpenter at linaro.org>

regards,
dan carpenter