Re: [PATCH V3 6/6] tty: serial: meson: Change request_irq to devm_request_irq and move devm_request_irq to meson_uart_probe()

[Martin Blumenstingl]

On Thu, Dec 30, 2021 at 11:22 AM Yu Tu <yu.tu@xxxxxxxxxxx> wrote:
>
> Because an interrupt error occurs when the user opens /dev/ttyAML* but
> don't close it, and then opens the same port again. This problem is
> encountered in actual projects.
I would like to hear from the serial driver maintainers whether the
described problem is a userspace or driver bug.

If it's a driver bug then this should be sent as a separate patch
(unrelated to this series) with a fixes tag.

[...]
> +       ret = devm_request_irq(&pdev->dev, port->irq, meson_uart_interrupt,
> +                              0, dev_name(&pdev->dev), port);
You can replace dev_name(&pdev->dev) with NULL to achieve the same
result with less code.
dev_name(dev) is the default value, see [0]


Best regards,
Martin


[0] https://elixir.bootlin.com/linux/v5.15/source/kernel/irq/devres.c#L64