This is a note to let you know that I've just added the patch titled
clk: ti: omap3+: dpll: use non-locking version of clk_get_rate
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
clk-ti-omap3-dpll-use-non-locking-version-of-clk_get_rate.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a0d54c3899aaeb047969d9479263c6bcf385c331 Mon Sep 17 00:00:00 2001
From: Tero Kristo <t-kristo@xxxxxx>
Date: Sat, 20 Feb 2016 13:12:57 +0200
Subject: clk: ti: omap3+: dpll: use non-locking version of clk_get_rate
From: Tero Kristo <t-kristo@xxxxxx>
commit a0d54c3899aaeb047969d9479263c6bcf385c331 upstream.
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.
This fixes an issue where PM runtime will hang the system if enabled
with a serial console before a suspend-resume cycle.
Signed-off-by: Tero Kristo <t-kristo@xxxxxx>
Tested-by: Tony Lindgren <tony@xxxxxxxxxxx>
Fixes: a53ad8ef3dcc ("clk: ti: Convert to clk_hw based provider APIs")
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/clk/ti/dpll3xxx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/clk/ti/dpll3xxx.c
+++ b/drivers/clk/ti/dpll3xxx.c
@@ -437,7 +437,8 @@ int omap3_noncore_dpll_enable(struct clk
parent = clk_hw_get_parent(hw);
- if (clk_hw_get_rate(hw) == clk_get_rate(dd->clk_bypass)) {
+ if (clk_hw_get_rate(hw) ==
+ clk_hw_get_rate(__clk_get_hw(dd->clk_bypass))) {
WARN_ON(parent != __clk_get_hw(dd->clk_bypass));
r = _omap3_noncore_dpll_bypass(clk);
} else {
Patches currently in stable-queue which might be from t-kristo@xxxxxx are
queue-4.4/clk-ti-omap3-dpll-use-non-locking-version-of-clk_get_rate.patch
