Re: Is it useful to support user level drivers

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 21 Jun 2001 14:28:10 +0100 (BST)

> Lastly an IRQ kernel module can disable_irq() from interrupt handler
> and enable it again only on explicit acknowledge from user.

No. The IRQ might be shared, and you get a slight problem if you just disabled
an IRQ needed to make progress for user space to handle the IRQ

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