clk: WARN_ON about to disable a critical clock

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1455225554-13267-3-git-send-email-mturquette@baylibre.com

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 275201fd7b01..dede0ce679e4 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -574,6 +574,9 @@ static void clk_core_unprepare(struct clk_core *core)
         if (WARN_ON(core->prepare_count == 0))
                 return;
 
+        if (WARN_ON(core->prepare_count == 1 && core->flags & CLK_IS_CRITICAL))
+                return;
+
         if (--core->prepare_count > 0)
                 return;
 
@@ -679,6 +682,9 @@ static void clk_core_disable(struct clk_core *core)
         if (WARN_ON(core->enable_count == 0))
                 return;
 
+        if (WARN_ON(core->enable_count == 1 && core->flags & CLK_IS_CRITICAL))
+                return;
+
         if (--core->enable_count > 0)
                 return;