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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Nicolin Chen <nicoleotsuka@gmail.com>,
        Thierry Reding <treding@nvidia.com>
Subject: [PATCH 5.10 690/717] clk: tegra: Do not return 0 on failure
Date:   Mon, 28 Dec 2020 13:51:28 +0100
Message-Id: <20201228125054.030386186@linuxfoundation.org>
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From: Nicolin Chen <nicoleotsuka@gmail.com>

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>

---
 drivers/clk/tegra/clk-dfll.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- 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
 			    &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);