Problem with exclusive interrupt in hostap_cs

[Larry Finger]

Jouni,

This was posted on the PCMCIA mailing list by Jack Schneider:

> Hi, folks  Using Debian Lenny OS with 2.6.28.2-486 kernel.
> I have a very old DEC VP575 laptop which I want to use as back-up
> server.  I need two net connections.  When I use a single pccard,
> wired, all is well.  If I insert my second card, WIFI-Intersil Prism2.5 
> I get the following /var/log/messages error:
> pcmcia: request for exclusive IRQ couuld not be fulfilled.
> pcmcia: the driver needs updating to supported shared IRQ lines

The two drivers being loaded are hostap_cs and xirc2ps_cs. The latter one is
coded to handle shared interrupts, but hostap_cs is not.

I would have no problem changing the driver interrupt registration in the
link->irq structure, but I was not quite sure how change prism2_interrupt() to
detect the shared case when the interrupt status register is 0xFFFF.

Could you please take a look at this?

Thanks,

Larry