libata and legacy ide pcmcia failure

Mark Lord lkml at
Fri Jun 8 18:11:01 EDT 2007

Robert de Rooy wrote:
> Mark Lord wrote:
>> I still don't see much evidence that interrupts are actually 
>> functioning here.
>> It would be good to see /proc/interrupts before/after libata tries to 
>> talk to it.
>> Let's assume for the moment that interrupts are b0rken.
>> The legacy IDE driver can talk to such devices completely without 
>> interrupts,
>> if the IDE polling patch (below) is applied.
>> So, Robert:  could you try again with the old IDE driver,
>> except apply this patch to it first?  This will give valuable info.
> I tried the patch, but a get a kernel panic on boot with it. I can try 
> to get a screenshot of it tomorrow.

Oh crap.  I did test it a couple of months ago, but my boot/root drive
is libata not IDE -- so no panic on boot with it.  After booting, it worked
just fine talking to PC-CARD CF devices using the polling.


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