clk: tegra: Do not return 0 on failure

commit 6160aca443148416994c022a35c77daeba948ea6 upstream.

Return values from read_dt_param() will be either TRUE (1) or
FALSE (0), while dfll_fetch_pwm_params() returns 0 on success
or an ERR code on failure.

So this patch fixes the bug of returning 0 on failure.

Fixes: 36541f0499fe ("clk: tegra: dfll: support PWM regulator control")
Cc: <stable@vger.kernel.org>
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/clk/tegra/clk-dfll.c b/drivers/clk/tegra/clk-dfll.c
index cfbaa90..a5f526b 100644 (file)
--- a/drivers/clk/tegra/clk-dfll.c
+++ b/drivers/clk/tegra/clk-dfll.c
@@ -1856,13 +1856,13 @@ static int dfll_fetch_pwm_params(struct tegra_dfll *td)
                            &td->reg_init_uV);
        if (!ret) {
                dev_err(td->dev, "couldn't get initialized voltage\n");
-               return ret;
+               return -EINVAL;
        }
 
        ret = read_dt_param(td, "nvidia,pwm-period-nanoseconds", &pwm_period);
        if (!ret) {
                dev_err(td->dev, "couldn't get PWM period\n");
-               return ret;
+               return -EINVAL;
        }
        td->pwm_rate = (NSEC_PER_SEC / pwm_period) * (MAX_DFLL_VOLTAGES - 1);