[parisc-linux] Re: [PATCH] PCMCIA: Disable probing on parisc

[James Bottomley]

On Sun, 2005-12-04 at 10:33 +0000, Russell King wrote:
> On Sun, Dec 04, 2005 at 01:04:23AM -0500, Kyle McMartin wrote:
> > PCMCIA port and memory probing is broken on parisc, disabling both
> > allows the PCMCIA subsystem to work on parisc systems.
> 
> Do you know why it's broken?
> 
> The memory probing works by mapping the CIS into memory and then trying
> to read it.  If you're saying it's broken, that implies that we can't
> read the CIS, and therefore we can't use the addresses being probed.

On parisc, any read to a region that doesn't respond HPMCs (crashes) the
box.  PA also has separated I/O space, so most random I/O reads are of
non-responding regions.

My solution was simply to force the pcmcia subsystem not to probe and
instead believe the map we passed in from the pcmcia daemon.

James