staging: imx-drm: imx-tve: Check the return value of 'regulator_enable()'

Since commit c8801a8 (regulator: core: Mark all get and enable calls as
__must_check) we need to check the value returned by 'regulator_enable()'.

Do this check to get rid of the following build warning:

drivers/staging/imx-drm/imx-tve.c: In function 'imx_tve_probe':
drivers/staging/imx-drm/imx-tve.c:671:19: warning: ignoring return value of 'regulator_enable', declared with attribute warn_unused_result [-Wunused-result]

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/staging/imx-drm/imx-tve.c b/drivers/staging/imx-drm/imx-tve.c
index ac1634464407..03892de9bd7e 100644
--- a/drivers/staging/imx-drm/imx-tve.c
+++ b/drivers/staging/imx-drm/imx-tve.c
@@ -670,7 +670,9 @@ static int imx_tve_probe(struct platform_device *pdev)
         tve->dac_reg = devm_regulator_get(&pdev->dev, "dac");
         if (!IS_ERR(tve->dac_reg)) {
                 regulator_set_voltage(tve->dac_reg, 2750000, 2750000);
-                regulator_enable(tve->dac_reg);
+                ret = regulator_enable(tve->dac_reg);
+                if (ret)
+                        return ret;
         }
 
         tve->clk = devm_clk_get(&pdev->dev, "tve");