On 01/28/2016 09:00 PM, Tony Lindgren wrote:

* Tero Kristo [off-list ref] [160128 10:48]:

quoted

On 01/28/2016 07:22 PM, Tony Lindgren wrote:

quoted

* Tero Kristo [off-list ref] [160128 03:44]:

quoted

On 01/28/2016 01:37 PM, Tero Kristo wrote:

quoted

As the code in this file is being executed within irq context in some
cases, we must avoid the clk_get_rate which uses mutex internally.
Switch the code to use clk_hw_get_rate instead which is non-locking.

Signed-off-by: Tero Kristo <redacted>

Ooops, sorry. Sent wrong version (read: old) of this patch, please ignore
this one. Will re-send the correct version in a bit.

I think this is still needed as a fix for -rc cycle with cc: stable
as otherwise we have omap4 and 5 hang if PM runtime is enabled before
a suspend/resume cycle?

Look at the other patch I sent, it should accomplish the same thing, and
more.

https://www.spinics.net/lists/linux-clk/msg06094.html

Right.. But is that suitable for the -rc cycle with cc stable?

Hmm yea, thats a good question, we may need to resurrect this patch 
after all.

You should also describe the bug it causes in the change log.
Something like:

This fixes an issue where PM runtime will hang the system if
enabled with a serial console before a suspend-resume cycle.

Yea I can add this to the desc if we want to keep this version of the patch.

-Tero