I have expanded on this a bit. I was not calling probe_irq_on() and
probe_irq_off(). I am now wrapping the outb_p() calls:

mask = probe_irq_on();
outb_p() ....

val = probe_irq_off(mask);

My mask is 0x3c78 (11110001111000 binary) but val is 0.

Behaviour is unchanged.




On Mon, Jan 6, 2014 at 4:27 PM, Rajat Sharma [off-list ref] wrote:

It would be nice to post the code when asking for debugging help. Looks
like your interrupts are in masked state but when you unload the driver
they are getting unmasked and hence you are receiving them on unload.

-Rajat


On Mon, Jan 6, 2014 at 4:09 PM, Eric Fowler [off-list ref] wrote:

quoted

I am trying to figure out interrupts by writing a shadow of Rubini's
'short' program. Recall that Rubini tells us to enable parallel port
interrupts by wiring pins 9&10 together, then writing binary data to the
parallel port's address.

I am doing that, but:
- I don't see interrupts when I write to the port
- I do see one interrupt when I unload the driver (in the fop's .release
method)
- This happens whether or not the pins are wired up.

What is going on here?



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