@@ -487,6 +487,7 @@ static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
struct tegra_devfreq *tegra = dev_get_drvdata(dev);
struct dev_pm_opp *opp;
unsigned long rate;
+ int err;
opp = devfreq_recommended_opp(dev, freq, flags);
if (IS_ERR(opp)) {
@@ -496,8 +497,13 @@ static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
rate = dev_pm_opp_get_freq(opp) * KHZ;
dev_pm_opp_put(opp);
- clk_set_min_rate(tegra->emc_clock, rate);
- clk_set_rate(tegra->emc_clock, 0);
+ err = clk_set_min_rate(tegra->emc_clock, rate);
+ if (err)
+ return err;
+
+ err = clk_set_rate(tegra->emc_clock, 0);
+ if (err)
+ return err;
return 0;
}
The clk_set_min_rate() could fail and in this case clk_set_rate() sets rate to 0, which may drop EMC rate to minimum and make machine very difficult to use. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- drivers/devfreq/tegra-devfreq.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)