clk: tegra: tegra124-emc: Fix clock imbalance in emc_set_timing()

After calling clk_prepare_enable(), clk_disable_unprepare() needs
be called when prepare_timing_change() failed.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/clk/tegra/clk-tegra124-emc.c b/drivers/clk/tegra/clk-tegra124-emc.c
index bdf6f4a..74c1d89 100644 (file)
--- a/drivers/clk/tegra/clk-tegra124-emc.c
+++ b/drivers/clk/tegra/clk-tegra124-emc.c
@@ -249,8 +249,10 @@ static int emc_set_timing(struct tegra_clk_emc *tegra,
        div = timing->parent_rate / (timing->rate / 2) - 2;
 
        err = tegra->prepare_timing_change(emc, timing->rate);
-       if (err)
+       if (err) {
+               clk_disable_unprepare(timing->parent);
                return err;
+       }
 
        spin_lock_irqsave(tegra->lock, flags);