Re: eata irq abuse (was: Re: Linux 2.5.60)

[James Bottomley <James.Bottomley@steeleye.com>]

On Wed, 2003-02-12 at 08:25, Christoph Hellwig wrote:
> On Wed, Feb 12, 2003 at 09:13:10AM -0500, Ballabio_Dario@emc.com wrote:
> > Last time I tried to run the detect routine with interrupts enabled,
> > it just hung at the first occurrence on an inb() from
> > the board registers. If someone is able to have it 
> > working with interrupts enabled and qualifies the
> > solution on all the platforms and eata boards,
> > I'd be more than happy to remove it.
> 
> Ah, you don't need the lock but the disabled interrupts!

In general, that's not correct: most HBA registers have to be accessed
in sequence, thus you need global protection from anyone else touching
them while you're at the registers.  This is what host_lock was designed
for.

James