The enable count of critical clocks may not drop below 1. Otherwise
the new parent during a reparenting of a critical clock will not
be enabled.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/clk/clk.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 05bc21a6d4..5777c9c58e 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -84,12 +84,14 @@ void clk_disable(struct clk *clk)
if (!clk->enable_count)
return;
+ if (clk->enable_count == 1 && clk->flags & CLK_IS_CRITICAL) {
+ pr_warn("Disabling critical clock %s\n", clk->name);
+ return;
+ }
+
clk->enable_count--;
if (!clk->enable_count) {
- if (clk->flags & CLK_IS_CRITICAL)
- return;
-
if (clk->ops->disable)
clk->ops->disable(clk);
--
2.25.0
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