lkml.org 
[lkml]   [2001]   [Nov]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 'spurious 8259A interrupt: IRQ7'
Richard B. Johnson wrote:

>
> IRQ7 is usually connected to the parallel port. If there is no driver
> installed, that expects interrupts, you could end up with this
> annoying message because the printer status bits are all ORed into
> that IRQ line. You can disable this with software, though, and it
> might be a good idea.
>
> outb(0, BASE+2);
>
> ... where BASE is 0x278, 0x378, 0x3bc, etc.. the printer ports.


Hmmmm. I have a driver installed! I use a printer in my parallel port and i
need lp module is installed.

But... i am go to see if this message appears only on boot (before i load
the module) or appears all time...


> Also, a catch-all for confused interrupt controllers is IRQ7. Even
> without a parallel port, you can still get an occasional spurious
> interrupt. I think the kernel should have an interrupt handler for
> this interrupt that does nothing except ACK the interrupt and
> keep its mouth shut. The request_irq() procedure should ignore
> the fact that it is "in use", and let any driver have it without
> sharing it.

--
____________
/ Piter PUNK \_____________________________________________________
| |
| | E-Mail: piterpk@terra.com.br (personal) |
| .|. roberto.freires@gds-corp.com (professional) |
| /V\ |
| // \\ UIN: 116043354 Homepage: www.piterpunk.hpg.com.br |
| /( )\ |
| ^`~'^ ----> Slackware Linux - The Best One! <---- |
| #105432 |
`-------------------------------------------------------------------'

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:13    [W:0.079 / U:0.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site