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    SubjectRe: [RFC] [PATCH 02/62] mpu401:snd_mpu401_uart_new(): split semantic of irq_flags
    Yong Zhang wrote:
    > Now snd_mpu401_uart_new() parameter 'irq_flags' take two role
    > in it: one is the condition to request_irq and the other is
    > the real irq_flags which will be transfered to request_irq().
    > So add another parameter 'want_irq' to take the role of the
    > first one, this will make it easy to remove IRQF_DISABLED.

    Please note that the irq number is also intended to pass this

    > * @irq: the irq number, -1 if no interrupt for mpu
    > ...
    > - if (irq >= 0 && irq_flags) {
    > if (request_irq(irq, snd_mpu401_uart_interrupt, irq_flags,

    Of course, most of snd_mpu401_uart_new()'s users get this wrong and use
    0 instead of -1, relying on the irq_flags parameter only. But if these
    are fixed to use irq == -1, we get the same effect without having to
    introduce another parameter.


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