[PATCH] clk: clk_set_rate() must fail if CLK_SET_RATE_GATE is set and clk is enabled

[viresh.kumar@st.com (Viresh Kumar)]

This is well documented but isn't implemented. clk_set_rate() must check if
flags have CLK_SET_RATE_GATE bit set and is enabled too.

Untested patch.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
---
 drivers/clk/clk.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 9d11c19..65dc35d 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -905,6 +905,11 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
 	if (rate == clk->rate)
 		goto out;
 
+	if ((clk->flags & CLK_SET_RATE_GATE) && __clk_is_enabled(clk)) {
+		ret = -EBUSY;
+		goto out;
+	}
+
 	/* calculate new rates and get the topmost changed clock */
 	top = clk_calc_new_rates(clk, rate);
 	if (!top) {
-- 
1.7.9