[media] s5p-tv: Don't ignore return value of regulator_bulk_enable() in hdmi_drv.c

This patch fixes following compilation warning:
 CC [M]  drivers/media/platform/s5p-tv/hdmi_drv.o
drivers/media/platform/s5p-tv/hdmi_drv.c: In function ‘hdmi_resource_poweron’:
drivers/media/platform/s5p-tv/hdmi_drv.c:583:23: warning: ignoring return value
 of ‘regulator_bulk_enable’, declared with attribute warn_unused_result

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 12 insertions, 4 deletions

diff --git a/drivers/media/platform/s5p-tv/hdmi_drv.c b/drivers/media/platform/s5p-tv/hdmi_drv.c
index cd525f193240..1b34c3629858 100644
--- a/drivers/media/platform/s5p-tv/hdmi_drv.c
+++ b/drivers/media/platform/s5p-tv/hdmi_drv.c
@@ -576,16 +576,22 @@ static int hdmi_s_stream(struct v4l2_subdev *sd, int enable)
         return hdmi_streamoff(hdev);
 }
 
-static void hdmi_resource_poweron(struct hdmi_resources *res)
+static int hdmi_resource_poweron(struct hdmi_resources *res)
 {
+        int ret;
+
         /* turn HDMI power on */
-        regulator_bulk_enable(res->regul_count, res->regul_bulk);
+        ret = regulator_bulk_enable(res->regul_count, res->regul_bulk);
+        if (ret < 0)
+                return ret;
         /* power-on hdmi physical interface */
         clk_enable(res->hdmiphy);
         /* use VPP as parent clock; HDMIPHY is not working yet */
         clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
         /* turn clocks on */
         clk_enable(res->sclk_hdmi);
+
+        return 0;
 }
 
 static void hdmi_resource_poweroff(struct hdmi_resources *res)
@@ -728,11 +734,13 @@ static int hdmi_runtime_resume(struct device *dev)
 {
         struct v4l2_subdev *sd = dev_get_drvdata(dev);
         struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
-        int ret = 0;
+        int ret;
 
         dev_dbg(dev, "%s\n", __func__);
 
-        hdmi_resource_poweron(&hdev->res);
+        ret = hdmi_resource_poweron(&hdev->res);
+        if (ret < 0)
+                return ret;
 
         /* starting MHL */
         ret = v4l2_subdev_call(hdev->mhl_sd, core, s_power, 1);