[PATCH v10 8/9] clk: Take the prepare lock when updating the per-user constraints

[Tomeu Vizoso]

Signed-off-by: Tomeu Vizoso <tomeu.viz...@collabora.com>
---
 drivers/clk/clk.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index f283dcc..1ad8cb7 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1734,15 +1734,25 @@ EXPORT_SYMBOL_GPL(clk_set_rate);
 int clk_set_floor_rate(struct clk *clk_user, unsigned long rate)
 {
        struct clk_core *clk = clk_to_clk_core(clk_user);
+       int ret;
+
+       clk_prepare_lock();
 
        clk_user->floor_constraint = rate;
-       return clk_provider_set_rate(clk, clk_provider_get_rate(clk));
+       ret = clk_provider_set_rate(clk, clk_provider_get_rate(clk));
+
+       clk_prepare_unlock();
+
+       return ret;
 }
 EXPORT_SYMBOL_GPL(clk_set_floor_rate);
 
 int clk_set_ceiling_rate(struct clk *clk_user, unsigned long rate)
 {
        struct clk_core *clk = clk_to_clk_core(clk_user);
+       int ret;
+
+       clk_prepare_lock();
 
        WARN(rate > 0 && rate < clk_user->floor_constraint,
             "clk %s dev %s con %s: new ceiling %lu lower than existing floor 
%lu\n",
@@ -1750,7 +1760,11 @@ int clk_set_ceiling_rate(struct clk *clk_user, unsigned 
long rate)
             clk_user->floor_constraint);
 
        clk_user->ceiling_constraint = rate;
-       return clk_provider_set_rate(clk, clk_provider_get_rate(clk));
+       ret = clk_provider_set_rate(clk, clk_provider_get_rate(clk));
+
+       clk_prepare_unlock();
+
+       return ret;
 }
 EXPORT_SYMBOL_GPL(clk_set_ceiling_rate);
 
-- 
1.9.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/