Re: [PATCH 1/1] UIO: Add a write() function to enable/disable interrupts

Greg KH
2008-05-24T04:45:29Z

On Fri, May 23, 2008 at 01:55:57PM +0200, Hans J. Koch wrote:
> Sometimes it is necessary to enable/disable the interrupt of a UIO device
> from the userspace part of the driver. With this patch, the UIO kernel driver
> can implement an "irqcontrol()" function that does this. Userspace can write
> an s32 value to /dev/uioX (usually 0 or 1 to turn the irq off or on). The
> UIO core will then call the driver's irqcontrol function.

Why not just a new sysfs file for the uio device, irq_enabled, or
something like that? That way our main read/write path is left alone.

thanks,

greg k-h