Re: [RFC] disable_irq()/enable_irq() semantics and ide-probe.c

[Jeff Garzik]

Benjamin Herrenschmidt wrote:
> On Thu, 2003-10-09 at 19:03, Jeff Garzik wrote:
>
>
> > Easily solved with a synchronize_irq()  ;-)
>
>
> No. synchronize_irq will do nothing to an irq that is
> still somewhere in the HW path from the device to the core,
> and even in the core it may be queued for some cycles before
> actually delivered.


hmmm, ok :)

Well my main objection is disable_irq+free_irq+enable_irq.  Seems to me 
we'll wind up coding around that.  Maybe a free_and_enable_irq is 
appropriate to avoid such a situation?  Oh well, just thinking out loud...

	Jeff



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/