linux-kernel - [PATCH v2 2/3] clk: ti: check clock type before doing autoidle ops

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Date:   Sat, 10 Nov 2018 21:31:14 +0100
From:   Andreas Kemnade <andreas@...nade.info>
To:     t-kristo@...com, mturquette@...libre.com, sboyd@...nel.org,
        linux-omap@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, bcousson@...libre.com,
        paul@...an.com, tony@...mide.com, letux-kernel@...nphoenux.org
Cc:     Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH v2 2/3] clk: ti: check clock type before doing autoidle ops

Code might use autoidle api with clocks not being omap2 clocks,
so check if clock type is not basic

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
New in v2
---
 drivers/clk/ti/autoidle.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/ti/autoidle.c b/drivers/clk/ti/autoidle.c
index 161f67850393..5bdae5552d38 100644
--- a/drivers/clk/ti/autoidle.c
+++ b/drivers/clk/ti/autoidle.c
@@ -54,8 +54,12 @@ static DEFINE_SPINLOCK(autoidle_spinlock);
 int omap2_clk_deny_idle(struct clk *clk)
 {
 	struct clk_hw_omap *c;
+	struct clk_hw *hw = __clk_get_hw(clk);
 
-	c = to_clk_hw_omap(__clk_get_hw(clk));
+	if (clk_hw_get_flags(hw) & CLK_IS_BASIC)
+		return -EINVAL;
+
+	c = to_clk_hw_omap(hw);
 	if (c->ops && c->ops->deny_idle) {
 		unsigned long irqflags;
 
@@ -77,8 +81,12 @@ int omap2_clk_deny_idle(struct clk *clk)
 int omap2_clk_allow_idle(struct clk *clk)
 {
 	struct clk_hw_omap *c;
+	struct clk_hw *hw = __clk_get_hw(clk);
 
-	c = to_clk_hw_omap(__clk_get_hw(clk));
+	if (clk_hw_get_flags(hw) & CLK_IS_BASIC)
+		return -EINVAL;
+
+	c = to_clk_hw_omap(hw);
 	if (c->ops && c->ops->allow_idle) {
 		unsigned long irqflags;
 
-- 
2.11.0