On Mon, Dec 30, 2013 at 4:10 PM, Paul Walmsley [off-list ref] wrote:

Hi Grant, Rob,

On Tue, 10 Dec 2013, Paul Walmsley wrote:

quoted

On Sun, 24 Nov 2013, Grant Likely wrote:

quoted

On Fri, 22 Nov 2013 17:50:35 -0800, Tony Lindgren [off-list ref] wrote:

quoted

* Tony Lindgren [off-list ref] [131122 17:16]:

quoted

* Tony Lindgren [off-list ref] [131122 17:09]:

quoted

* Russell King - ARM Linux [off-list ref] [131122 16:56]:

quoted

On Fri, Nov 22, 2013 at 04:43:35PM -0800, Tony Lindgren wrote:

quoted

+         /* See of_device_resource_notify for populating interrupts */
+         for (i = 0; i < num_irq; i++, res++) {
+                 res->flags = IORESOURCE_IRQ;
+                 res->start = -EPROBE_DEFER;
+                 res->end = -EPROBE_DEFER;

NAK.  Definitely a bad idea to start introducing magic values other into
resources.  Please don't do this.

Do you have any better ideas on how to sort out this issue then?

I guess we could allocate all the resources lazily here, I'll take a look
at that.

Here's a version that allocates the resources lazily with the notifier.
Seems to boot, need to play with it a bit more though to make sure we're
not overwriting resources for any legacy devices.

Blurg. Using a notifier really feels like we don't have a good handle on
a reasonable solution yet. Basically it means we're hooking into the
driver core without /looking/ like we're hooking into the driver core. I
don't think this is any better, but I don't have a better suggestion at
the moment.   :-(

Unfortunately this patch, or something that accomplishes the same results,
is somewhat high-priority for us on OMAP.  OMAP37xx got prematurely
converted to DT booting, and now dynamic power management is broken:

    http://marc.info/?l=linux-arm-kernel&m=138658294830408&w=2

Tony writes that this patch is one of the two patches needed to get things
working again:

    http://marc.info/?l=linux-arm-kernel&m=138660942506846&w=2

Is it possible to get this patch, or something similar, merged for
v3.13-rc?

Once something like PM is broken, it's pretty easy for other broken
patches to make it into the tree, since it becomes very difficult to test
without turning into a maintainer denial-of-service attack.

Ping.  Could you please provide some guidance here about what you'd need
to get this solved for v3.13-rc?

I agree with doing the platform_get_irq modification and feel free to
add my ack. I'm going to be offline for the next week.

Rob