>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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |