Re: [BUG] ide dma_timer_expiry, then hard lockup

Sergei Shtylyov
2007-06-19T16:31:06Z

Alan Cox wrote:
>>> Indeed... but the thing is we don't know what's asserted in this case
>>>-- remember, it's reading the status register that locks everything up...

>>Exactly. And IORDY shouldn't really apply there,
>>unless some nitwit standards person wrote it into a spec..

> Could it be we need to reset the state machine at this point before we
> touch the registers again - that wouldn't be the first controller with
> this limit and undocumented.

> On the 370 we already

Yeah, that could be. And because IORDY pin becomes DSTROBE for UltraDMA it
might have stuck low due to this (if the chip never asserted STOP)...

> Alan

MBR, Sergei