>On Sat, Jul 23, 2005 at 02:29:24AM +0200, Pavel Machek wrote: >> > Is it necessary to do free_irq for suspend? Shouldn't disable_irq >> > be enough? >> >> Due to recent changes in ACPI, yes, it is neccessary. > >What if some other driver is sharing the IRQ, and requires IRQs to be >enabled for the resume to complete?
IRQ sharing is an excellent example, not a counter-example, of why it is necessary to disable devices and free IRQs on suspend, and acquire them again on resume. eg. if a device is suspended, but the hardware still causes an interrupt on a shared IRQ, another device can suffer a screaming IRQ failure. Documentation/power/pci.txt has as much as we know about how to address this -- but I'm certainly open to suggestions on how to be less invasive to the drivers while having some chance of being robust. thanks, -Len - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
