Re: [PATCH] CONFIG_PCMCIA_PROBE fix

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Mon, Dec 22, 2003 at 12:48:44AM -0500, Andres Salomon wrote:
> Some time ago, Russell King submitted a patch to use CONFIG_PCMCIA_PROBE
> instead of CONFIG_ISA in pcmcia probing code.  Unfortunately,
> CONFIG_PCMCIA_PROBE still is only set if CONFIG_ISA is set.  This means
> that if ISA isn't enabled, certain things break in 2.6; for example, my
> pcmcia nic/modem (using pcnet_cs/serial_cs).  These worked fine in 2.4;
> I tracked the behavior to the fact that if irq_mask is set on a pcmcia
> socket (instead of pci_irq), and PCMCIA_PROBE isn't set,
> pcmcia_request_irq refuses to assign an irq.  Most of the pcmcia bridges
> appear to set an irq_mask, so the attached patch changes Kconfig to set
> CONFIG_PCMCIA_PROBE if any of those bridges are selected.
> 
> Please apply this (or an alternative fix), as it fixes a 2.6 regression
> in pcmcia functionality.

Please don't.  David Hinds has a better fix for this, which changes
the way we handle the allocation of IRQs.  David's change is all
round a far better way to handle the problem - if all ISA interrupts
are used or unavailable, we fall back to using the PCI interrupt
instead.

Please also note that there /is/ a PCMCIA list which patches should
be forwarded to - linux-pcmcia which is at lists.infradead.org

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core