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
